Aire One East Heating & Cooling

Making the Decision: Renting vs. Buying Air Conditioners Based on Your Unique Situation

Ben Amina — Tue, 27 Oct 2026 09:38:55 +0000

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Furnace Making Noise? What Banging, Squealing and Rattling Mean

Ben Amina — Mon, 26 Oct 2026 10:04:19 +0000

Aire One East Heating & Cooling Furnace Making Noise? What Banging, Squealing and Rattling Mean Match the sound to the likely cause, learn which noises are normal, and know when to shut the furnace off and call 9 Furnace Sounds Safe DIY Checks Durham Region 2026 GUIDE AIRE ONE EAST DURHAM REGION ★ 4.8 Google (364) Carrier Factory Authorized 24/7 Emergency Service Family Owned Since 1991 TSSA Licence #1219734 Serving Durham Region Updated October 25, 2026 · Reviewed by Ben Amina, TSSA-certified gas technician, Licence #1219734 · Aire One East Heating & Cooling By Ben Amina, Owner and Manager · TSSA Licence #1219734Aire One East Heating & Cooling, 1910 Dundas St E #117, Whitby A furnace making noise is telling you something, and the type of sound is the best clue to what it is. A soft click, a whoosh as the burners light, and the steady hum of the blower are normal. A loud bang when the heat comes on, a high-pitched squeal, a metal rattle, or a grinding scrape are not. Some causes of a furnace making noise are simple fixes, like a loose panel or a dirty filter. Others, like a boom at startup or a rattle from inside the cabinet, can point to a safety problem. This guide matches nine common furnace sounds to their likely causes, explains which ones you can check yourself, and tells you when to turn the furnace off and call a licensed technician. If the furnace is not heating at all, start with our furnace not working guide. Key takeaways When your furnace is making noise, note what the sound is, where it comes from, and when it happens: at startup, while running, or after it shuts off. A loud bang or boom when the burners light usually means delayed ignition. Turn the furnace off and call a technician, because it can damage the heat exchanger. Popping or ticking from the ducts as they warm up and cool down is usually normal metal expansion, not a furnace fault. Squealing usually comes from a worn blower belt or dry motor bearings. Grinding or scraping means metal is touching metal, so shut the furnace off right away. Rattling is often just a loose access panel or screw, but a rattle from inside the cabinet can mean a loose blower wheel or a cracked heat exchanger and needs an inspection. Short answer: a furnace making noise usually has a worn or loose part. Banging at startup points to delayed ignition from dirty burners or a weak ignitor. Squealing points to a blower belt or motor bearings. Rattling points to a loose panel, screws, ductwork, or blower wheel. Grinding, humming, repeated clicking, whistling, and rumbling each point to a different part, covered below. Replace a dirty filter and tighten a loose access panel first. If you hear a loud bang, a grinding scrape, or a rattle from inside the furnace, switch it off at its power switch and call a licensed technician. Aire One East offers 24/7 heating service across Durham Region. Call 905-576-7600. On this page Why is my furnace making noise? Normal furnace sounds vs warning sounds 9 furnace noises and what they mean Furnace noises at a glance Quick checks you can do safely When a furnace making noise needs a pro Key terms in this article Frequently asked questions Why is my furnace making noise? A gas furnace has several moving and heating parts that each make their own sound. The inducer motor starts first to clear the exhaust, the ignitor heats up or sparks, the gas valve opens and the burners light, and then the blower motor pushes warm air through the ducts. When a part wears out, comes loose, gets dirty, or falls out of adjustment, the sound changes. That is why a furnace making noise is often the first warning of a problem, well before it stops heating. Pay attention to three things: the type of sound, where it seems to come from, and when it happens in the heating cycle. Those three answers narrow the cause down quickly, and they help a technician diagnose the problem faster when you call. Normal furnace sounds vs warning sounds Not every furnace making noise has a problem. A healthy furnace makes a few quiet, predictable noises every cycle. It is a change in the sound, or a sound that gets louder over time, that deserves attention. Normal: a soft click when the thermostat calls for heat, the hum of the inducer motor, a gentle whoosh as the burners light, the steady sound of air moving through the vents, and light ticking from metal ducts as they warm up. Warning signs: a loud bang or boom, a high-pitched squeal or screech, a metal rattle, grinding or scraping, a loud buzz, clicking that repeats without the burners lighting, a sharp whistle, or a rumble after the burners shut off. The blower motor and wheel are behind most cases of a furnace making noise like squealing or grinding. Worn bearings, a loose wheel, or a worn belt are quick repairs when caught early. 9 furnace noises and what they mean 1. Banging or booming when the heat comes on A loud bang or boom a few seconds after the furnace starts is the most serious common sound. It usually means delayed ignition: gas builds up in the burner area before it lights, then ignites all at once. Dirty or rusty burners, a weak ignitor, or low gas pressure can cause it. Each small explosion stresses the heat exchanger and can crack it over time, which raises the risk of carbon monoxide. If you hear your furnace making noise like this, turn it off and call a licensed gas technician. Our guide to furnace carbon monoxide warning signs explains why a cracked heat exchanger matters. 2. Popping or ticking from the ducts Sometimes what sounds like a furnace making noise is really the ductwork. If the bang or pop comes from the ducts, […]

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Furnace Won’t Turn Off? Why It Runs Constantly and How to Fix It

Ben Amina — Wed, 21 Oct 2026 10:00:31 +0000

Aire One East Heating & Cooling Furnace Won’t Turn Off?Why It Runs Constantly First find out if it is the fan or the heat that keeps running, then try these safe checks before you call 7 Common CausesSafe DIY ChecksDurham Region 2026 GUIDEAIRE ONE EASTDURHAM REGION ★ 4.8 Google (364)Carrier Factory Authorized24/7 Emergency ServiceFamily Owned Since 1991TSSA Licence #1219734Serving Durham Region Updated October 21, 2026 · Reviewed by Ben Amina, TSSA-certified gas technician, Licence #1219734 · Aire One East Heating & Cooling By Ben Amina, Owner and Manager · TSSA Licence #1219734Aire One East Heating & Cooling, 1910 Dundas St E #117, Whitby When your furnace won’t turn off, the first question is what exactly keeps running: the fan, or the heat. If only the fan runs and the air from the vents feels cool or room temperature, the cause is usually a thermostat fan set to ON, a stuck blower relay, or a fan limit switch. If warm air keeps blowing and the house is getting hotter than the setting, the burners are not shutting off, which can point to a thermostat fault or, rarely, a stuck gas valve. This guide walks through the seven most common causes, the safe checks you can do in a few minutes, and when to call a licensed technician. For problems with the thermostat itself, see our thermostat not working guide. Key takeaways When a furnace won’t turn off, start by checking whether it is the fan or the heat that keeps running, because the causes are different. A thermostat fan set to ON instead of AUTO is the most common reason a furnace seems to run nonstop. A stuck blower relay, a faulty control board, or a fan limit switch can keep the fan running after the heat shuts off. Long run times during a Durham cold snap can be normal, but a furnace that never reaches the setting may be undersized or losing heat through leaky ducts. If the burners will not shut off and the house keeps getting hotter, turn the furnace off at its power switch and call a technician. Short answer: a furnace won’t turn off most often because the thermostat fan is set to ON, the thermostat setting or wiring is calling for heat nonstop, or a stuck blower relay or fan limit switch keeps the fan running. Dirty filters, leaky ducts, and an undersized furnace can also make it run far longer than normal. Set the fan to AUTO and lower the temperature first. If it still runs, switch the furnace off at its power switch and call a licensed technician. Aire One East offers 24/7 heating service across Durham Region. Call 905-576-7600. On this page Why won’t my furnace turn off? Fan or heat: what keeps running when a furnace won’t turn off? 7 reasons a furnace won’t turn off How long should a furnace run? Causes at a glance Quick checks you can do safely When a furnace won’t turn off, call a pro Key terms in this article Frequently asked questions Why won’t my furnace turn off? A furnace runs in cycles. The thermostat calls for heat, the burners light, the blower pushes warm air through the house, and when the room reaches the setting, the thermostat stops calling for heat. The burners shut off, the blower runs a little longer to pull the last heat out of the heat exchanger, and then everything goes quiet. When your furnace won’t turn off, something in that chain is stuck on: the thermostat keeps calling for heat, a switch or relay keeps the blower running, or the house is losing heat so fast that the furnace can never catch up. Knowing which part is stuck tells you whether it is a quick fix or a service call. Fan or heat: what keeps running when a furnace won’t turn off? When a furnace won’t turn off, hold your hand over a supply vent. If the air is cool or room temperature and the furnace is quiet apart from the blower, only the fan is running. That points to the fan setting, a blower relay, or a fan limit switch. If the air is warm and the house is getting hotter than the thermostat setting, the burners are still firing. That points to the thermostat, its wiring, or the control board, and in rare cases a gas valve that is not closing. A furnace that runs warm air for hours but never warms the house to the setting is a third case, usually caused by airflow, heat loss, or sizing. A fan set to ON instead of AUTO is the most common reason a furnace seems to run nonstop. Check it first. 7 reasons a furnace won’t turn off 1. The thermostat fan is set to ON With the fan set to ON, the blower runs all the time, even when the burners are off, so it sounds like the furnace never stops. Switch the fan setting to AUTO, and the blower will run only during heating cycles. That one change fixes most calls where a furnace won’t turn off. This is also why the air can feel cool between cycles, which we cover in our furnace blowing cold air guide. 2. A thermostat setting, location, or wiring problem If the thermostat is set much higher than the house can reach, the furnace won’t turn off because it keeps trying to get there. A thermostat in a drafty hallway or near an outside door may read colder than the rest of the house, and a weak battery, a failing thermostat, or a shorted thermostat wire can keep calling for heat. Try lowering the setting by a few degrees. If the furnace still keeps running with the thermostat switched to OFF, the problem is likely the wiring or the control board. Our guide to winter thermostat settings explains sensible temperatures. 3. A stuck blower relay or faulty control board The control board uses a relay to switch […]

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Furnace Carbon Monoxide: Warning Signs, Causes and How to Stay Safe

Ben Amina — Wed, 21 Oct 2026 09:38:15 +0000

Aire One East Heating & Cooling Furnace Carbon MonoxideWarning Signs and How to Stay Safe You cannot see it or smell it. Here is how to spot a problem, what to do if your alarm sounds, and the 2026 Ontario alarm rules 7 Warning Signs2026 Alarm RulesDurham Region 2026 GUIDEAIRE ONE EASTDURHAM REGION ★ 4.8 Google (364)Carrier Factory Authorized24/7 Emergency ServiceFamily Owned Since 1991TSSA Licence #1219734Serving Durham Region Updated October 14, 2026 · Reviewed by Ben Amina, TSSA-certified gas technician, Licence #1219734 · Aire One East Heating & Cooling By Ben Amina, Owner and Manager · TSSA Licence #1219734Aire One East Heating & Cooling, 1910 Dundas St E #117, Whitby If your carbon monoxide alarm is sounding and anyone feels unwell, stop reading. Get everyone out of the house now, then call 911 from outside. Do not go back in until emergency services say it is safe. Furnace carbon monoxide is the colourless, odourless gas a fuel-burning furnace can release into your home when something goes wrong with combustion or venting, such as a cracked heat exchanger, a blocked vent, or dirty burners. A healthy, well-maintained furnace sends its exhaust safely outside, so the risk is low, but you cannot see, smell, or taste carbon monoxide, which is why working CO alarms and a yearly inspection matter so much in a Durham winter. This guide covers the warning signs, the most common causes, what to do if your alarm goes off, the 2026 Ontario CO alarm rules, and how to prevent problems. For a full tune-up checklist, see our furnace maintenance guide. Key takeaways Carbon monoxide has no colour, smell, or taste, so a working CO alarm is the only reliable way to know it is there. Furnace carbon monoxide problems usually come from a cracked heat exchanger, a blocked vent, poor combustion, or a damaged flue pipe. Flu-like symptoms such as headache, nausea, and dizziness that ease when you leave the house are a classic warning sign. Since January 1, 2026, Ontario homes with a fuel-burning appliance need CO alarms next to each sleeping area and on every storey. A yearly furnace inspection with a combustion and venting check is the best prevention. Short answer: furnace carbon monoxide leaks happen when combustion gases cannot vent safely outside, most often because of a cracked heat exchanger, a blocked vent or flue, or dirty burners. Watch for a sounding CO alarm, flu-like symptoms that improve away from home, a yellow burner flame, soot, or heavy window condensation. If your CO alarm sounds, get everyone outside and call 911. After emergency services clear the home, have a licensed gas technician inspect the furnace before you use it again. Aire One East offers 24/7 heating service across Durham Region. Call 905-576-7600. On this page What is furnace carbon monoxide and how does it happen? 7 warning signs of furnace carbon monoxide What causes furnace carbon monoxide leaks What to do if your CO alarm goes off CO alarm rules in Ontario (2026) Warning signs at a glance How to prevent furnace carbon monoxide problems Key terms in this article Frequently asked questions What is furnace carbon monoxide and how does it happen? A gas furnace burns natural gas to make heat. When combustion is clean and complete, the main exhaust gases are carbon dioxide and water vapour, and the venting system carries them outside through a chimney or PVC vent pipes. Carbon monoxide forms when the fuel does not burn completely, for example when the burners are dirty or the furnace is not getting enough air. It only becomes dangerous inside your home when that exhaust cannot get out the way it should, because of a crack, a blockage, a disconnected pipe, or air pressure that pulls the exhaust back in. That is why furnace carbon monoxide is mostly a venting and maintenance problem, and why it is so preventable. A CO alarm in the hallway outside the bedrooms is the only reliable way to detect carbon monoxide, since you cannot see or smell it. 7 warning signs of furnace carbon monoxide 1. Your CO alarm sounds This is the clearest sign of all. A CO alarm sound is different from a smoke alarm, so learn the difference, along with the separate low-battery and end-of-life chirps. Treat a full alarm as real until a technician rules out furnace carbon monoxide. 2. Flu-like symptoms that ease when you leave Headache, nausea, dizziness, tiredness, and confusion are common early symptoms of carbon monoxide exposure. A key clue is that several people or pets in the home feel unwell at the same time, without a fever, and feel better after spending time away from the house. If that sounds familiar, furnace carbon monoxide could be the cause, so get outside and call 911. 3. A yellow or flickering burner flame On most gas furnaces, a healthy burner flame is steady and mostly blue. A lazy yellow or orange flame, or one that flickers or lifts off the burner, can mean incomplete combustion, which is how furnace carbon monoxide is produced. Never open the burner compartment yourself, but if you notice this through the sight glass, book an inspection. 4. Soot or streaks around the furnace or vents Black or brown soot on the furnace cabinet, around the flue pipe, or near the vent outside is a sign of poor combustion or exhaust escaping where it should not, and one of the most visible signs of furnace carbon monoxide risk. 5. Heavy condensation on windows Lots of moisture on the inside of windows in winter can have many causes, but combined with other signs it can point to exhaust gases, which contain water vapour, not venting properly. 6. Rust, water, or damage on the flue pipe Rust streaks, corrosion, water stains, or a sagging or disconnected section of flue or vent pipe all mean the exhaust path may not be sealed, a common source of furnace carbon monoxide. 7. A burner or pilot that keeps going […]

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Furnace Leaking Water? Causes and What to Do

Ben Amina — Thu, 08 Oct 2026 08:53:57 +0000

Aire One East Heating & Cooling Furnace Leaking Water?Causes and What to Do Most leaks come from the condensate drain or pump. Here is how to find the source, what you can safely check, and when to call 8 Common CausesSafe DIY ChecksDurham Region 2026 GUIDEAIRE ONE EASTDURHAM REGION ★ 4.8 Google (364)Carrier Factory Authorized24/7 Emergency ServiceFamily Owned Since 1991TSSA Licence #1219734Serving Durham Region Updated October 8, 2026 · Reviewed by Ben Amina, TSSA-certified gas technician, Licence #1219734 · Aire One East Heating & Cooling By Ben Amina, Owner and Manager · TSSA Licence #1219734Aire One East Heating & Cooling, 1910 Dundas St E #117, Whitby A furnace leaking water is almost always a high-efficiency furnace whose condensate system has stopped draining properly. These furnaces make water as part of normal operation, often several litres a day in a Durham winter, and a clogged drain line, a failed condensate pump, or a loose fitting sends it onto the floor instead of down the drain. This guide covers the eight most common causes, how to find where the water is coming from, what you can safely check yourself, and when to call a licensed technician. If the furnace has also stopped heating, see our furnace not working guide. Key takeaways High-efficiency furnaces produce water normally, so a leak usually means the condensate drain, trap, or pump is not doing its job. A clogged condensate line and a failed or unplugged condensate pump are the two most common causes. In a Durham cold snap, a condensate line running through a cold space can freeze and back up. Turn the furnace off at its power switch before you touch a wet area, because water and electrical parts do not mix. Water from inside the cabinet, rust, or a leak that keeps coming back needs a licensed technician. Short answer: a furnace leaking water is usually caused by a clogged condensate drain line, a failed or full condensate pump, or a loose drain fitting on a high-efficiency furnace. Other causes are a frozen drain line, a leaking humidifier, or an air conditioner coil pan above the furnace. Turn off the power at the furnace switch, soak up the water, and check the pump and drain line. If the leak continues, call a licensed technician. Aire One East offers 24/7 heating service across Durham Region. Call 905-576-7600. On this page Why is my furnace leaking water? 8 causes of a furnace leaking water Leak sources at a glance Quick checks you can do safely When a furnace leaking water needs a pro How to prevent furnace leaks Key terms in this article Frequently asked questions Why is my furnace leaking water? It depends on the type of furnace. A high-efficiency furnace, the kind with two white PVC pipes running outside, pulls so much heat from the exhaust that the water vapour in it condenses into liquid. That water, called condensate, flows through a small trap and a drain line to a floor drain, or into a condensate pump that pushes it to a drain. When any part of that path clogs, cracks, freezes, or fails, you end up with a furnace leaking water onto the floor. A standard-efficiency furnace does not make condensate, so if an older furnace is leaking, the water is more likely coming from a humidifier, the air conditioner coil above it, or venting problems. Finding which part is wet is the first step to the fix. 8 causes of a furnace leaking water 1. A clogged condensate drain line or trap Over time, the condensate line and trap collect sludge, scale, and sometimes algae. When they clog, the water backs up and spills out of the trap or the furnace cabinet. This is the most common reason for a furnace leaking water. A technician can flush the trap and line and confirm the water flows freely. Many furnaces also have a safety switch that shuts the burners off when the drain backs up, so a clog can also cause a no-heat call. 2. A failed, full, or unplugged condensate pump If your furnace is not next to a floor drain, a small condensate pump collects the water and pumps it away. When the pump motor fails, the float switch sticks, the outlet tube kinks, or the pump simply gets unplugged, the reservoir overflows onto the floor. Check that the pump is plugged in and that it hums and empties when the water rises. A pump that will not run leaves you with a furnace leaking water every cycle, so it needs to be replaced. A condensate pump that stops running overflows onto the floor. Check that it is plugged in and empties when the water rises. 3. A loose or cracked drain fitting The PVC drain fittings and the rubber or vinyl tubing on a high-efficiency furnace can work loose, crack, or lose their seal over the years. The result is a furnace leaking water from a joint, often right where the drain leaves the cabinet. Look for drips at each fitting with a flashlight. A cracked fitting or failed seal should be replaced, not taped. Drips at a PVC drain joint usually mean a loose fitting or a failed seal that should be replaced. 4. A frozen condensate line Some condensate lines run through an unheated garage, crawl space, or outside wall. In a Durham cold snap, the water in that section can freeze, block the line, and back up into the furnace. You may see a furnace leaking water on the coldest days, or the furnace may shut down. A technician can reroute or insulate the line, or add heat tape where it is needed. 5. Condensation from the vent pipe The PVC exhaust pipe on a high-efficiency furnace carries warm, moist air. If the pipe is not sloped back toward the furnace, or a joint is not sealed, condensation can run down the outside of the pipe or drip from a joint and look like a furnace […]

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Furnace Smells Like Burning? What Is Normal and What Is Not

Ben Amina — Thu, 08 Oct 2026 08:32:41 +0000

Aire One East Heating & Cooling Furnace Smells Like Burning?What Is Normal and What Is Not Dust, plastic, oil, or rotten eggs: what each smell means, what you can safely check, and when to get out and call 7 Common SmellsSafety FirstDurham Region 2026 GUIDEAIRE ONE EASTDURHAM REGION ★ 4.8 Google (364)Carrier Factory Authorized24/7 Emergency ServiceFamily Owned Since 1991TSSA Licence #1219734Serving Durham Region Updated October 8, 2026 · Reviewed by Ben Amina, TSSA-certified gas technician, Licence #1219734 · Aire One East Heating & Cooling By Ben Amina, Owner and Manager · TSSA Licence #1219734Aire One East Heating & Cooling, 1910 Dundas St E #117, Whitby When a furnace smells like burning on the first cold day of fall, it is usually dust that settled on the burners and heat exchanger over the summer burning off, and the smell fades within a few hours. A smell that lingers, gets stronger, or smells like hot plastic, rubber, or rotten eggs is different, and it can point to an overheating motor, an electrical fault, or a gas leak. This guide explains the seven smells we hear about most on Durham Region service calls, what each one means, what you can safely check, and when to call. If your furnace has also stopped heating, see our furnace not working guide. Key takeaways A dusty burning smell for the first few hours of the heating season is normal and should fade on its own. If the smell lasts more than a day, a dirty filter or dust on the blower is the most common cause. A hot plastic, rubber, or electrical smell means turn the furnace off at its power switch and call a technician. A rotten egg smell is not a furnace problem to troubleshoot. It can be a gas leak, so leave the house and call Enbridge from outside. A yearly tune-up and regular filter changes prevent most burning smells before they start. Short answer: if your furnace smells like burning dust when you first turn it on for the season, that is normal and should clear within a few hours. If the smell lingers, smells electrical or like burning plastic, or comes with smoke, turn the furnace off and call a licensed technician. If you smell rotten eggs, leave the house and call the Enbridge Gas emergency line at 1-866-763-5427 from outside. For anything else, Aire One East offers 24/7 heating service across Durham Region. Call 905-576-7600. On this page Is it normal when a furnace smells like burning? 7 reasons a furnace smells like burning Furnace smells at a glance Quick checks you can do safely When a furnace smells like burning, call a pro How to prevent burning smells Key terms in this article Frequently asked questions Is it normal when a furnace smells like burning? Often, yes. Through the spring and summer, a thin layer of dust settles on the burners, the heat exchanger, and the inside of the ducts. The first time the furnace fires up in the fall, that dust heats up and burns off, and you get a dry, dusty burning smell through the vents. In most Durham homes it fades within a few hours, and it is rarely noticeable after the first day. If your furnace smells like burning dust only on that first day, crack a window and let it run. The time to worry is when the smell lasts longer than a day, keeps coming back, gets stronger, or smells sharp, chemical, or electrical rather than dusty. That kind of smell means something is overheating, and if your furnace smells like burning in that way, it is worth stopping it and finding out why. 7 reasons a furnace smells like burning 1. Dust burning off at the start of the season This is the most common reason a furnace smells like burning, and it is harmless. The smell is dry and dusty, it starts when the burners first light for the season, and it fades over a few hours. If it is still strong the next day, move on to the next cause. 2. A dirty or clogged air filter A filter packed with dust restricts airflow, so the furnace runs hotter than it should, and the dust trapped on and around the filter can scorch. The result: your furnace smells like burning dust every time it runs, not just on the first day. Pull out the filter and look at it. If it is grey and packed, replace it with a new one of the same size. Our furnace filter guide explains sizes and how often to change it. A clogged filter makes the furnace run hot and can leave a dusty burning smell every cycle. Replacing it is the first and easiest check. 3. An overheating blower motor The blower motor pushes warm air through your ducts. When its bearings wear out, or when dust builds up on the motor and blower wheel, it can overheat and give off a hot, burning rubber or hot metal smell. Sometimes you will also hear a hum or squeal. If your furnace smells like burning rubber, turn it off and call a technician, because a motor that overheats can fail completely, and in rare cases it can be a fire risk. Dust packed on the blower wheel and motor can overheat and smell like burning rubber. Cleaning it is part of a yearly tune-up. 4. Electrical components or wiring A sharp smell of burning plastic or hot electrical insulation can come from a failing capacitor, a loose wire, an overheating transformer, or a damaged control board. When a furnace smells like burning plastic, take it seriously, because it is the most urgent smell after gas. Switch the furnace off at its power switch, the one that looks like a light switch on or near the unit. If you see smoke, leave the house and call 911. Otherwise, call a licensed technician before you turn it back on. 5. Something too close to the […]

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Why Is My Furnace Blowing Cold Air?

Ben Amina — Thu, 01 Oct 2026 06:45:48 +0000

Aire One East Heating & Cooling Furnace Blowing Cold Air?9 Fixes to Try First Most causes are simple. Here is what you can safely check, and when to call a licensed gas technician 9 Common CausesSafe DIY ChecksDurham Region 2026 GUIDEAIRE ONE EASTDURHAM REGION ★ 4.8 Google (364)Carrier Factory Authorized24/7 Emergency ServiceFamily Owned Since 1991TSSA Licence #1219734Serving Durham Region Updated October 1, 2026 · Reviewed by Ben Amina, TSSA-certified gas technician, Licence #1219734 · Aire One East Heating & Cooling By Ben Amina, Owner and Manager · TSSA Licence #1219734Aire One East Heating & Cooling, 1910 Dundas St E #117, Whitby A furnace blowing cold air usually means the blower fan is running while the burners are not making heat, and in most Durham homes the cause is simple: a thermostat fan set to ON, a clogged filter, or a vent blocked by snow. This guide walks through the nine most common causes, the checks you can safely do yourself in a few minutes, and the signs that mean it is time for a licensed technician. If your home has no heat at all, see our furnace repair service. Key takeaways The most common reason for a furnace blowing cold air is the thermostat fan set to ON instead of AUTO. A dirty filter can overheat the furnace, trip the high-limit switch, and shut the burners off while the fan keeps blowing. On high-efficiency furnaces, snow or ice blocking the white PVC vent pipes outside is a very common Durham winter cause. You can safely check the thermostat, filter, power switch, and outdoor vents. Gas, ignition, and flame sensor work is for a licensed gas technician. If you smell gas or a CO alarm sounds, leave the house first and call for help from outside. Short answer: a furnace blowing cold air is most often caused by the thermostat fan set to ON, a clogged air filter tripping the high-limit switch, or a blocked intake or exhaust vent. Check those three first. If the air stays cold after that, the problem is likely ignition, the flame sensor, or the gas supply, which needs a licensed technician. Aire One East offers 24/7 heating service across Durham Region. Call 905-576-7600. On this page Why is my furnace blowing cold air? 9 causes of a furnace blowing cold air Quick checks you can do safely Causes at a glance When a furnace blowing cold air needs a pro How to prevent it this winter Key terms in this article Frequently asked questions Why is my furnace blowing cold air? A gas furnace makes heat in two parts. The burners light and warm a metal heat exchanger, and the blower fan pushes your household air across it and out through the vents. When you feel a furnace blowing cold air, the blower is running but the heat side is not doing its job. Sometimes that is normal and lasts only a moment. More often, a safety control has shut the burners off on purpose, because something such as a dirty filter, a blocked vent, or a weak flame told the furnace it was not safe to keep firing. The fix depends on which part stopped, so the causes below go from the quickest checks to the jobs for a professional. Most cold-air calls trace back to the thermostat, the filter, or the venting, so those are checked first. 9 causes of a furnace blowing cold air 1. The thermostat fan is set to ON This is the number one reason we see for a furnace blowing cold air. With the fan set to ON, the blower runs all the time, including the stretches between heating cycles when the burners are off, so you feel cool air from the vents. Switch the fan setting to AUTO, and the blower will only run while the furnace is actually heating. 2. The thermostat is on the wrong mode or has weak batteries Make sure the thermostat is set to HEAT, not COOL or OFF, and that the setpoint is a few degrees above the room temperature. A blank or flickering screen often means low batteries, which can stop the thermostat from calling for heat even though the fan still runs. Fresh batteries fix a furnace blowing cold air more often than you would think. 3. The furnace is still warming up When a heating cycle starts, the burners light first and the blower waits a short time before it turns on. On some furnaces you may feel a little cool air from the ducts for the first minute or so while the heat exchanger warms. That is normal. If the air never turns warm after a few minutes, keep reading. 4. A dirty filter is overheating the furnace A clogged filter chokes the airflow across the heat exchanger, so it runs too hot. The furnace protects itself by tripping the high-limit switch, which shuts off the burners while the blower keeps running to cool things down. The result is a furnace blowing cold air on and off. Check the filter, and if it is grey and packed with dust, replace it. Our furnace filter guide covers sizes and how often to change it. 5. Snow or ice is blocking the outdoor vent pipes High-efficiency furnaces vent through two white PVC pipes on the side of the house. After a Durham snowstorm or a hard freeze, snow, ice, or frost can block them. The furnace senses the blockage through its pressure switch and refuses to light, so the burners stay off. Gently clear snow and ice from around both pipes by hand, keep at least a foot of clearance below them, and give the furnace a few minutes to restart. 6. The condensate line is clogged or frozen High-efficiency furnaces also make water, which drains away through a small plastic line. If that line clogs or freezes, a safety switch stops the burners from firing, which can leave you with a furnace blowing cold air. Signs include […]

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Best Winter Thermostat Settings

Ben Amina — Thu, 01 Oct 2026 06:26:59 +0000

Aire One East Heating & Cooling Winter Thermostat SettingsThe Sweet Spot That Saves Money Set it to 20 degrees Celsius when home, lower it at night, and watch your heating bill drop 20C Sweet SpotSave on HeatingDurham Region 2026 GUIDEAIRE ONE EASTDURHAM REGION ★ 4.8 Google (364)Carrier Factory Authorized24/7 Emergency ServiceFamily Owned Since 1991TSSA Licence #1219734Serving Durham Region Updated October 1, 2026 · Reviewed by Ben Amina, TSSA-certified gas technician, Licence #1219734 · Aire One East Heating & Cooling By Ben Amina, Owner and Manager · TSSA Licence #1219734Aire One East Heating & Cooling, 1910 Dundas St E #117, Whitby Winter thermostat settings are the heating temperatures you set through the cold months, and getting them right is one of the easiest ways to cut your Durham heating bill without feeling the difference. The short version: set it to about 20 degrees Celsius when you are home and awake, and lower it while you sleep or are away. This guide gives the ideal numbers, a sample schedule, and the smart-thermostat tips that make it automatic. For year-round comfort, see our maintenance and protection plans. Key takeaways The best winter thermostat settings for most Durham homes are about 20 degrees Celsius (68F) while you are home and awake. Lowering the temperature by 3 to 5 degrees Celsius at night or when away can save up to 10 percent a year on heating. Never turn the heat off entirely in a Durham winter, since reheating a cold house and the risk of frozen pipes cost more. A programmable or smart thermostat makes the setbacks automatic, so you save without thinking about it. Insulation, humidity, and your heating system all affect the most comfortable setting for your home. Short answer: the ideal winter thermostat settings are about 20 degrees Celsius when home and awake, lowered to roughly 16 to 17 degrees Celsius at night or when away, which can save up to 10 percent a year. A programmable thermostat makes these winter thermostat settings automatic. Aire One East services heating systems across Durham Region. Call 905-576-7600. On this page The ideal winter thermostat settings A sample winter thermostat schedule How much do winter thermostat settings save? Programmable and smart thermostats What affects your ideal setting Key terms in this article Frequently asked questions The right settings work best with a properly maintained, correctly sized heating system behind them. The ideal winter thermostat settings For most Durham homes, the ideal winter thermostat settings are about 20 degrees Celsius, or 68 degrees Fahrenheit, while you are home and awake. That is the sweet spot energy experts recommend: warm enough to be comfortable, low enough to keep the bill reasonable. Every degree higher adds roughly 3 percent to your heating cost, so creeping up to 22 or 23 degrees is comfortable but noticeably more expensive over a long Ontario winter. The trick is not to suffer at a cold setting all day, but to pair a comfortable daytime temperature with lower settings when you do not need the heat. A sample winter thermostat schedule The real savings in winter thermostat settings come from lowering the temperature when you are asleep or out. Here is a simple schedule that keeps a Durham home comfortable while trimming the bill. Time Setting Why Morning, awake and home 20C (68F) Comfortable daytime warmth Daytime, away at work 16 to 17C (about 62F) No need to heat an empty house fully Evening, home 20C (68F) Back to the comfort setting Overnight, asleep 16 to 17C (about 62F) You sleep better slightly cooler, and you save Away on vacation No lower than 15 to 16C Protects against frozen pipes A practical winter schedule for Durham homes, verified October 2026. Adjust to your comfort. How much do winter thermostat settings save? Dialing in your winter thermostat settings is one of the cheapest ways to lower a heating bill. Lowering the temperature by about 3 to 5 degrees Celsius for eight hours a day, while you sleep or are away, can save up to 10 percent a year on heating, and some households see more. The savings come because a cooler house loses heat to the outdoors more slowly, so your furnace or heat pump runs less. It costs nothing to do, and with a programmable thermostat it happens automatically. Pairing it with a yearly tune-up and a clean filter stretches the saving even further, since an efficient system makes every degree count. Programmable and smart thermostats The easiest way to stick to good winter thermostat settings is to let a programmable or smart thermostat do it for you. You set the schedule once, and it lowers the heat overnight and during work hours, then warms the house back up just before you wake or arrive home, so you never feel the setback. A smart thermostat goes further: you can adjust it from your phone, it learns your routine, and many can save an average of around 8 percent on heating and cooling. If you are upgrading, our team installs and wires all major smart thermostats, and our heating service can confirm your system is compatible. What affects your ideal setting The numbers above are a strong starting point, but a few factors shift the ideal winter thermostat settings for your home. Insulation and air sealing matter most: a drafty, poorly insulated home loses heat faster and may feel cold even at 20 degrees, which is a sign to seal and insulate rather than crank the heat. Humidity plays a role too, because properly humidified air feels warmer at the same temperature, so a whole-home humidifier can let you set the thermostat a touch lower. Your heating system matters as well, since a heat pump runs most efficiently with steadier settings, while a gas furnace handles setbacks easily. Households with infants, older adults, or anyone unwell may need a warmer, steadier setting, and comfort always comes first. A winter safety note. Never turn your heat off completely in a Durham winter, even when […]

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Furnace Short Cycling? 7 Causes & Fixes (2026)

Ben Amina — Wed, 23 Sep 2026 09:03:19 +0000

Aire One East Heating & Cooling Furnace Short Cycling?Why It Keeps Turning On and Off A furnace that starts and stops every few minutes is a warning sign, and often a simple fix Common Causes24/7 EmergencyDurham Region CALL 24/7905-576-7600DURHAM REGION ★ 4.8 Google (364)Carrier Factory Authorized24/7 Emergency ServiceFamily Owned Since 1991TSSA Licence #1219734Serving Durham Region Updated September 1, 2026 · Reviewed by Ben Amina, TSSA-certified gas technician, Licence #1219734 · Aire One East Heating & Cooling By Ben Amina, Owner and Manager · TSSA Licence #1219734Aire One East Heating & Cooling, 1910 Dundas St E #117, Whitby Furnace short cycling is when a furnace turns on and off too frequently, running for only a minute or two at a time instead of completing a full heating cycle. It leaves your home unevenly heated, drives up bills, and wears out the furnace, but the cause is often a simple one you can check yourself. This guide explains what it means, what causes it, how to fix it, and when to call a technician. If your furnace has stopped heating entirely, our furnace repair page can help. Key takeaways A furnace normally cycles three to eight times an hour; cycling every couple of minutes is furnace short cycling. The single most common cause is a dirty air filter, which makes the furnace overheat and shut down on its safety switch. A dirty flame sensor is another frequent cause, shutting the furnace off seconds after the burners light. Thermostat problems, blocked vents, and an oversized furnace can all cause short cycling too. If a filter change and vent check do not fix it, the cause is likely electrical or the heat exchanger, which needs a technician. Short answer: furnace short cycling usually comes from a dirty air filter, a dirty flame sensor, a thermostat problem, or blocked airflow, and the first fix to try is a fresh filter and clear vents. If it keeps cycling after that, call a licensed technician. Aire One East runs 24/7 across Durham Region. Call 905-576-7600. On this page Furnace short cycling: what it means What causes furnace short cycling? How do you fix a short cycling furnace? Furnace short cycling: when to call a technician Safety first Key terms in this article Frequently asked questions A fresh filter and clear vents fix most short cycling; the rest points to the flame sensor, thermostat, or controls. Furnace short cycling: what it means To spot furnace short cycling, it helps to know what normal looks like. A healthy furnace turns on, runs for about seven to twenty minutes until the home reaches the set temperature, then shuts off, cycling roughly three to eight times an hour. Furnace short cycling is when that cycle collapses to a couple of minutes or even seconds, so the furnace starts, stops, and restarts constantly without properly heating the house. It is not just annoying: each startup is the hardest moment for a furnace, so constant cycling wears out the blower, igniter, and other parts, and it can cut years off the unit’s life while raising your bills. What causes furnace short cycling? Most furnace short cycling traces to one of these causes. The first few you can check yourself; the rest need a technician. Cause Why it short cycles Who fixes it Dirty air filter Restricts airflow, the furnace overheats and trips its safety switch You Blocked vents or return grilles Same overheating from restricted airflow You Dirty flame sensor Cannot confirm the flame, so it locks out seconds after ignition You or a pro Thermostat problem or bad placement Misreads the temperature, sitting in sun or near a heat source You or a pro Faulty high limit switch Trips and shuts the furnace down prematurely Pro Oversized furnace Heats too fast, satisfies the thermostat, then shuts off Pro Cracked heat exchanger or overheating Safety shutdown, and a possible carbon monoxide risk Pro, urgent Ranked by how often they cause short cycling, verified September 2026. How do you fix a short cycling furnace? Start with the easy, safe fixes, because they solve most cases of furnace short cycling. Work through them in order. Replace the air filter: a clogged filter is the top cause; if light does not pass through it, put in a fresh one and see if the cycling stops. Clear the vents and returns: make sure furniture, rugs, and curtains are not blocking supply or return grilles, which chokes airflow. Check the thermostat: set it to auto rather than on, replace the batteries, and make sure it is not in direct sun or near a heat source that skews its reading. Clean the flame sensor: if you are comfortable and have turned off the power and gas, gently cleaning the flame-sensor rod often stops a furnace that shuts off seconds after lighting. If the furnace still short cycles after those steps, stop there. The remaining causes involve the electrical controls, the high limit switch, or the heat exchanger, and those are a technician’s job. Furnace short cycling: when to call a technician Some causes of furnace short cycling are not do-it-yourself fixes. Call a licensed technician if the cycling continues after a filter change and vent check, if you hear grinding or squealing during the cycle, if the furnace is clearly oversized for the home, or if you suspect the heat exchanger, since a cracked one can leak carbon monoxide. Our TSSA-licensed team covers Whitby, Oshawa, Ajax, Pickering, Courtice, Bowmanville, Port Perry, and Uxbridge with 24/7 emergency service, and a seasonal tune-up through our maintenance and protection plans prevents most short cycling before it starts. For filter specifics, see our furnace filter guide. Safety first. Furnace short cycling from overheating can point to a cracked heat exchanger, which can leak carbon monoxide, so do not ignore a furnace that repeatedly shuts itself down. Every home with a gas furnace needs a working carbon monoxide alarm. If a CO alarm sounds, get everyone out and call 911. If you smell […]

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Furnace Maintenance: 8 Essential Tasks (2026)

Ben Amina — Mon, 21 Sep 2026 08:47:05 +0000

Aire One East Heating & Cooling Furnace MaintenanceReady Before the Cold Hits A yearly fall tune-up keeps your furnace safe, efficient, and reliable through a Durham winter Yearly Tune-UpCarbon Monoxide SafetyDurham Region 2026 GUIDEAIRE ONE EASTDURHAM REGION ★ 4.8 Google (364)Carrier Factory Authorized24/7 Emergency ServiceFamily Owned Since 1991TSSA Licence #1219734Serving Durham Region Updated August 31, 2026 · Reviewed by Ben Amina, TSSA-certified gas technician, Licence #1219734 · Aire One East Heating & Cooling By Ben Amina, Owner and Manager · TSSA Licence #1219734Aire One East Heating & Cooling, 1910 Dundas St E #117, Whitby Furnace maintenance is the yearly professional tune-up and simple homeowner care that keeps a furnace running safely and efficiently through the heating season. For a Durham home, it is one of the highest-value jobs of the year, because it lowers bills, prevents mid-winter breakdowns, and, most importantly, keeps the system safe. This guide covers the tasks that matter, how often to do them, and which you can handle yourself. For repairs, see our furnace repair page. Key takeaways The core of furnace maintenance is a yearly professional tune-up, ideally in the fall before winter. The one task you should do yourself is changing the air filter every one to three months. A tune-up checks the heat exchanger and carbon monoxide levels, which is a safety step, not just an efficiency one. Regular care lowers heating bills, prevents breakdowns, and usually keeps the manufacturer warranty valid. Anything involving the burners, gas, or heat exchanger is a licensed-technician job. Short answer: furnace maintenance means booking a professional tune-up once a year, ideally in the fall, and changing the air filter yourself every one to three months. Done yearly, it keeps the furnace safe, lowers bills, and extends its life. Aire One East services furnaces across Durham Region. Call 905-576-7600. On this page Furnace maintenance: what it involves How often should you do furnace maintenance? Why does furnace maintenance matter? DIY vs professional furnace maintenance Carbon monoxide and gas safety Key terms in this article Frequently asked questions A fall tune-up checks the burners, heat exchanger, and safety controls before the furnace runs all winter. Furnace maintenance: what it involves Good maintenance splits into what you do and what a technician does. You keep the air filter clean; the technician handles the rest during an annual tune-up. A proper tune-up cleans and inspects the burners, checks the heat exchanger for cracks, tests the flame sensor and ignition, measures carbon monoxide, inspects the blower and airflow, checks the thermostat and safety controls, and confirms the venting is clear. It is as much a safety inspection as a performance one. Here is the full checklist and how often each task is due. Task How often DIY or pro Change the air filter Every 1 to 3 months You Keep the area around the furnace clear Ongoing You Clean and inspect the burners Yearly Pro Inspect the heat exchanger for cracks Yearly Pro Test the flame sensor and ignition Yearly Pro Measure carbon monoxide levels Yearly Pro Inspect the blower, airflow, and venting Yearly Pro Check the thermostat and safety controls Yearly Pro A practical yearly checklist for Durham furnaces, verified August 2026. For filters specifically, see our furnace filter guide. How often should you do furnace maintenance? For most homes, furnace maintenance should happen once a year, and the best time is the fall, before the heating season begins, so any problem is caught before you rely on the furnace daily. Booking early in the fall also beats the rush, when technicians are busiest. Between professional visits, change the filter every one to three months, and check it monthly through a cold Durham winter when the furnace runs hardest. Older furnaces, homes with pets, and heavy-use households benefit most from staying exactly on that yearly schedule, and a service plan is the easiest way to keep it from slipping. Why does furnace maintenance matter? Maintenance matters for three reasons, and the first is safety. A gas furnace burns fuel, and a cracked heat exchanger or poor venting can leak carbon monoxide, which a yearly inspection is designed to catch. The second is cost: a clean, tuned furnace burns less fuel for the same heat, so it lowers your bills, while a neglected one works harder and wears out faster. The third is reliability and lifespan, because the small faults a tune-up finds early are the ones that otherwise become a no-heat call on the coldest night. Most manufacturer warranties also require documented annual maintenance, so skipping it can void your coverage. For a system your family depends on all winter, that yearly visit is cheap insurance. DIY vs professional furnace maintenance Some of this care is safe for a homeowner, and some is strictly professional. Changing the filter and keeping the area around the furnace clear of clutter are the do-it-yourself tasks, and they matter more than people think. Everything else, cleaning the burners, inspecting the heat exchanger, testing the flame sensor and ignition, measuring carbon monoxide, and checking the gas and venting, must be done by a licensed technician, because gas and combustion work is licensed in Ontario and a mistake carries real safety risk. A professional visit also inspects parts you cannot see and tunes the system to specification, which is why many Durham homeowners fold it into a maintenance and protection plan. If a furnace is aging and needing frequent repairs, our guide to how long a furnace lasts in Ontario covers replacement. Carbon monoxide and gas safety. This is the reason yearly care is not optional. Every home with a gas furnace needs a working carbon monoxide alarm, and the furnace should be inspected yearly for a cracked heat exchanger, which can leak CO. If a carbon monoxide alarm sounds, get everyone out and call 911. If you smell gas, leave the house and call the Enbridge Gas emergency line at 1-866-763-5427 from outside. Never run a gas oven or unvented heater for warmth, and leave […]

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