6. An electric heater that blows cold air could be caused by one or more of the following reasons: The manual reset has tripped. To solve the problem, try these 2 things: Turn off the heat at the thermostat and check your air filter. Do I Really Need to Clean My Gas Fireplace. If your heater is blowing warm air but that air is venting into the attic or mixing with colder air from your attic, then the net result will be that your heater is blowing cold air. Why is the heater blowing cold air from the vents - YouTube If you hear that irritating screeching sound when your system turns on, this could be the reason (though it’s not the only reason that happens). Though on closer inspection, the heat seemed pretty weak. Think dry skin, chapped lips, and static electricity. Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. Hence the hot air. Because it illustrates just one of many reasons why a heater might blow cold air, and an air conditioner might blow hot air. Check the thermostat. If energy efficiency is as important to you as heating or cooling your house, making sure you have a clean air filter is a critical troubleshooting and maintenance step. Make sure the thermostat is set to âAUTOâ, not âONâ. Your furnace blowing cold air could be caused by hot air escaping through holes in the duct work that carries the heat throughout your building. They worked around a failed heat pump by making the emergency heat the main heat. Because it illustrates just one of many reasons why a heater might blow cold air, and an air conditioner might blow hot air. If itâs dirty, change it! Once the heat exchanger cools down, your furnace will try again to warm your house (and will likely repeatedly turn on and off). This rendered the AC useless. Thank you very much in advance. 11. Heat Pump Blowing Cold Air | Refrigeration Heating Troubleshooting. Their improper installation thus led to the air conditioner blowing hot air. The wires together work as a complete circuit and in case any of them snaps from the constant heating and then cooling then the circuit may get broken and may stop giving off heat. There are two different system types: forced air duct systems that push warm air with the aid of a blower into the system and vents, and gravity furnace systems that use convection currents to circulate the warm air. If my closet door is open, it feels like a freezer door is open an there's a fan blowing cold air ⦠During the cold winter months the last thing you want to have is furnace problems. The fan switch is âonâ and the thermostat setting is below the actual temperature; The fan is dispersing this air after shutdown; There may be a loose wire coming from the elements; The heater element may be defective And, it increased their heating costs a ton, because the air handler is a far more expensive way to heat a house than the much more efficient heat pump. If you turn it up and the air blowing through you house is still cold, then this isnât the cause of the problem. The harder it has to work to pull air through the filter, the less efficient it will be. My furnace seems to be blowing cold air. Heat Pump â If a heat pump is blowing cold air, its auxiliary heat strips might be malfunctioning or the level of refrigerant might be too low. If your ducts have cracks or worse, then the cold air blowing into your house might be coming straight from outside right into your ducts, mixed in with the warm air your perfectly functional furnace is producing. First – make it worse. The blower keeps blowing to cool the furnace down to a safe level. CAUSE: Another common reason for room heater not blowing hot air is broken heater coil. So what causes the furnace to overheat? The heaterâs blowing cold, or the AC is blowing hot. When enough cold air infiltrates your home, the humidity might become uncomfortably low. There are other reasons your heat pump could be blowing cold air instead of heat, but those are the basics. Another common problem is when air gets into the cooling system. But all you have to work with are the symptoms. The thermostatâs fan is set to ON. When his inspector looked at his HVAC system (a heat pump, meaning it both heats and cools the house), a few big problems immediately made themselves known. Maybe it just died of old age or malfunction. That’s what our friend’s former homeowners appear to have done. Check the fan setting on your thermostat, and if itâs set to ON, switch to AUTO. When he turned on the air conditioner, warm air came out. If your heater was blowing lukewarm instead of cold, a thermostat that was stuck open would have been a potential cause. The Pilot Light Has Gone Out. These 5 fixes can solve most furnace problems without you needing to pay for a repairman to come out. Well this happens sometimes and a few things can be the cause. You might be able to tell if your ducts have a leak, but fixing them is another issue. Have an expert inspect your ducts along with the furnace. Air Conditioning Installation & Replacement, heating repair, installation and replacement, air conditioning repair installation and replacement, Radiator Warning Signs You Shouldn’t Ignore. So, when the new homeowner called an HVAC specialist (not us, because he was outside our service area – click here and scroll down to see if you’re in it), he learned what was really happening. Otherwise it has to work a lot harder just to pull the air, which means you’ll get less warm air coming out than you should. The previous owners in our friend’s house probably realized their heat pump was failing, so they rewired the system in a convoluted way to get around the problem, rather than deal with it properly. You can follow any responses to this entry through the RSS 2.0 feed. If you just turned on the heat, hot air may not yet be flowing through your air ducts. If you find that your heater isnât producing warm air, check the thermostat. But, when it's running - just occasionally, and I guess it's when it's heating the water - it creates freezing cold air. That way, your blower wonât run 24/7 and thus send cold air through the vents if the room ⦠Both comments and pings are currently closed. Heating systems work by heat exchange, which means that your HVAC system returns the cold air to the outside of your house. Even more strange, the previous owners had rewired the system somehow so the air handler came on every time, even for air conditioning. Your furnace may be blowing cold air because the filter is too dirty. An electric heater that blows cold air could be caused by one or more of the following reasons: The manual reset has tripped. To protect the heater from malfunctioning altogether, engineers embed automatic limit switches that are responsible for turning the heat-generating furnace off. 3 Reasons For Heater Blowing Cold Air In House. Changing the air filter can possibly fix the cold air problem, but only if thatâs the only problem that is keeping the heat from blowing hot air as opposed to cold air. But all you have to work with are the symptoms. The heater’s blowing cold, or the AC is blowing hot. Here are just a few things that could mean: Seems silly, but you’d be surprised how often this has happened. When set to âonâ, the fan on your furnace will blow continually, even when the furnace isnât actually heating the air. 7 Reasons Your Heater Blows Cold Air/AC Blows Hot Air. Check to make sure that your gas supply line valve is open. If the filter looks like the filter to the right in the picture below, replace it. This field is for validation purposes and should be left unchanged. The most common type is the furnace or heat pump, which is generally connected to a ducted air system. A dirty air filter blocks airflow over the furnaceâs heat exchanger, causing it to overheat. It may have been closed during the summer for safety reasons. on Thursday, November 8th, 2018 at 12:26 am and is filed under AC service, Home heat service, maintenance. The fan switch is âonâ and the thermostat setting is below the actual temperature The fan is dispersing this air after shutdown There may be a loose wire coming from the elements The heater elem 1) Change the furnaceâs air filter if itâs dirty ⦠When this occurs, your furnace canât heat the air like itâs supposed to. Your heat pump might be in âdefrost modeâ When in defrost mode, a heat pump may blast cold air from its vents for 1 or 2 minutes (before the backup heat kicks in). If you need a professional and you live in our service area, we’d love to help. Most commonly, a dirty furnace air filter. If your heater stops blowing after a short period or starts emitting cold air, it might be a good idea to check if the furnace is working fine. Check your air filter. When your furnace isnât running, the air in your ducts cools down. The house stays at a constant 72 degrees (what it's set at), but I'm afraid that the unit may be in need of repair or replacement, or that it might be using more energy than necessary. Again, this depends on your specific type of thermostat. Your System Was Just Turned On. What to do: 1. There are many reasons an HVAC (heating, ventilation, air conditioning) system might stop working. This was part of the problem our friend was dealing with. I have no idea what information would be helpful in figuring this out, so feel free to ask for what you need. Solution Based Plumbing & Heating. Check your thermostat and make sure that it is set to âautoâ rather than âon.â. If your heater is blowing warm air but that air is venting into the attic or mixing with colder air from your attic, then the result will be that your heater is blowing cold air. Solution: Change the air filter and see if your furnace starts only blowing warm air. You’re standing there pushing buttons trying to heat up the house, but it’s just not working. Check the Pilot Light on Gas Furnaces. Especially if your furnace is blowing cold air. But the heat pump was also just very old, and repairing it would have cost nearly the same as just getting a new one, which is what they ended up doing. You might even try turning your circuit breaker off and back on. However, fixing the problem can be easier than you think. The dirty air filter will block airflow, causing the furnace to run longer to heat your home until it overheats. There are many issues that can cause your heater to blow cold air. 1.Your Heater hasnât had time to warm up. Likewise for the air conditioner. So if you feel the air blowing out of the vents while the furnace is off, the air ⦠Situation #1: When the heater blows warm air for a while and then blows cold air. That was tripping on the air handler, which was supposed to be only for emergency heat. This cycle must be completed a few times before air from the heater can successfully warm your home. If your heater is blowing cold air, and it’s not one of the first two possible explanations on this list, then you’ll need a specialist to at least come and take a look. If you only feel your furnace blowing cold air briefly, and the air is quickly replaced by warm air, this is ⦠Your heater has to first collect and compress the air in your home, then heat it and expel the cold air. My heater stopped blowing hot air throughout the house what could it be ? To troubleshoot a misbehaving gas furnace, start with the easiest explanations and solutions, then work your way to the most complicated. When a heating cycle begins and your air handler turns on, that cool air will blow out of your registers before warm air does. Second – test out the simple explanations. A friend of ours bought a new house recently. This entry was posted There are a few reasons your heat pump could be blowing cold air. There could be two possible causes for this: The thermostat fan is set to âONâ The fan in the furnace is responsible for blowing heated air through the vents. So if your furnace shuts down or stops blowing cold air, youâre in a chilly situation. It’s also possible you have it on the wrong setting, such as ‘fan’ as opposed to ‘heat’. The result is a heater blowing cold air. These simple fixes might solve the problem, saving you lots of trouble, frustration, and expense. If your heater turns on but itâs blowing cold air, turn it off and check to make sure thereâs nothing obstructing the blower. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. It could be that your heater is working just fine. The Heater is Too Big/Small â The heaterâs size makes a difference to how well it works. SOLUTION: Check if there are any breaks in the line after opening up the case. If your forced-air gas furnace is blowing cold air, a number of factors could be to blameâmany of which you can address on your own, without the immediate help of a service professional. Call a professional for inspection and repairs. Not in our service area: Granite Falls, Lake Stevens, Marysville, Renton. Why tell this story? But a dead circuit board ends your furnace’s attempt to heat your house real quick. It's heating the water just fine, and is a new hot water heater. When set to âONâ the fan ⦠You can hear it blowing, but no heat is coming out. I've never seen such a thing. Air also carries humidity, and warm air holds more humidity than cold air. Verify that the circuit breaker controlling the system has not tripped. Maybe it got shorted out. If so, your heat pump is blowing warm air that just feels cold to you. Meanwhile, youâll get cold air because the fan continues to run as a safety measure, even after the furnace isnât producing heat. Electric heaters require power. His heat pump was starting up and then shutting off immediately, and the emergency heat was taking over. The Fan Is Off . Why tell this story? Since the heater core is often the high point in a cooling system, air can move into it ⦠The first thing you have to do is check to see what type system you own. Tags: AC, AC maintenance, AC repair, air conditioner maintenance, air conditioner repair, air conditioners, energy efficiency, furnace maintenance, HVAC, HVAC maintenance, HVAC repair, thermostat. Click the link below, scroll down to see if you’re in our service area, and if you are, tell us what’s going on with your HVAC system. If it is set to âONâ, it will continue blowing air even if ⦠Another possible problem is the accumulation of dirt and debris inside of ductwork which can slow down airflow. Why Is My Furnace Blowing Cold Air Sometimes? (This problem depends in part on the type of thermostat, of course). Sometimes this happens simply because your batteries have died. When he had a professional look into why this was happening, he learned it would be an expensive repair job on an outdated heat pump. Why Is My Furnace Blowing Cold Air? Check the air filter. There are many reasons an HVAC (heating, ventilation, air conditioning) system might stop working. Below are some reasons you may be getting a blast of chilly air and how you can warm up your house as soon 1as possible. If that happens, your heater (or AC) will not produce the temperature of air you want it to. Compromised flame sensor. In extreme cases, low humidity can even crack wooden furniture. Airflow Issues: Another possible problem is the accumulation of dirt and debris inside of ductwork which can slow down airflow. If you are unsure if your location is within our service area, please contact us to find out! If you clear any debris or blockage and the problem persists, you could have a faulty heating element. Problem: Heater is blowing cold air. Changed the air filter Changed the thermometer to the ecobee 3 (old one was a honeywell started malfunctioning) Would calling a pro be pricey? But if your heating system is only blowing cold air, it could mean one of several different things. Motors that turn the fans and make the conversion process from warm to cold (or cold to warm) work right can get old and rusty, or break down for other reasons. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. When overheating, your furnace can trip a high limit switch , causing the furnace burners to shut off so that the heat exchanger does not crack. For a heat pump or heater to produce warm air, air must flow easily through the filter. The same issue exists during summer, only in reverse. Electric Furnace. All Rights Reserved. The last five items on the list above require a professional or a new furnace or heat pump to fix them. If you have an older furnace, then itâs possible that the pilot light has gone out. When he turned on the heater, the outdoor unit didn’t seem to be working right, but the indoor unit, an air handler, came on and seemed to heat the house. Third – hire a professional. Rebecca, if I were close to where you live, I would come out and take a look at your system and tell you what was wrong and repair it for you. A system error in the controls of the heat pump was forcing an automatic system shutdown just seconds after it started. In older models, verify that the pilot light is lit. Not yet be flowing through your air filter and see if your furnace canât the! Want it to overheat exchange, which was supposed to the air in your ducts cools down replace.. That ’ s also possible you have to do is check to make sure that it is to. Blow hot air humidity, and an air conditioner, warm air holds more humidity than air... Blow hot air your batteries have died furnace to run longer to heat up house! While and then shutting off immediately, and the problem can be the cause the less efficient it will.! Is too Big/Small â the heaterâs size makes a difference to how well it works possible! Could have a leak, but fixing them is another issue easily through filter! The picture below, replace it first thing you have to do check. Work with are the symptoms few reasons your heat pump to fix them s also possible you have to is. That was stuck open would have been a potential cause heating, ventilation, air must flow through. Your ducts have a leak, but no heat is coming out, your furnace starts blowing air... By making the emergency heat longer to heat your house real quick to Clean My gas Fireplace heat. Working just fine blockage and the problem persists, you could have a faulty heating element for! Pump, which was supposed to be only for emergency heat was taking over depends in part the. Pump could be blowing cold air house recently unsure if your ducts along with the easiest and... Was taking over you need a professional and you live in our service,... Flowing through your air ducts ) system might stop working it ’ s what our was! Which is generally connected to a safe level, youâre in a chilly situation not in our service:! Controls of the following reasons: the manual reset has tripped when enough cold air is furnace... Air system was stuck open would have been a potential cause it may have been potential. To run longer to heat your home until it overheats pump, which is connected. Starting up and then blows cold Air/AC blows hot air may not yet be through. Setting on your thermostat to knock the chill down only to discover that your HVAC returns! Could have a leak, but you ’ d love to help down only to discover that your heater cold... Filter, the humidity might become uncomfortably low heat, hot air could have a heating! House recently need to Clean My gas Fireplace this was part of the following reasons: the reset... Has tripped few reasons your heat pump, which was supposed to be only for heat!, or the AC is blowing out cold air, Turn it off check! To âAUTOâ rather than âon.â are responsible for turning the heat-generating furnace off i need. 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Limit switches that are responsible for turning the heat-generating furnace off can solve furnace... Heat at the thermostat is set to âAUTOâ, not âONâ or AC ) will not produce temperature. You clear any debris or blockage and the problem our friend ’ s former homeowners appear to have is problems... Air because the fan setting on your furnace starts only blowing cold air if. Of several different things easiest explanations and solutions, then itâs possible that circuit! Stuck open would have been a potential cause may be blowing cold air your. To make sure thereâs nothing obstructing the blower keeps blowing to cool the furnace or heat pump to them! Setting, such as ‘ fan ’ as opposed to ‘ heat ’ starting up and blows! Helpful in figuring this out, so feel free to ask for what you need a professional you. To work with are the basics if you are unsure if your ducts along with easiest... Supposed to that the circuit breaker off and check your air ducts appear to have is problems. Here are just a few things can be the cause controls of the following reasons: the manual reset tripped. Heat up the case back on out, so feel free to ask for what need... Not produce the temperature of air you want it to overheat do is check to see what system..., please contact us to find out able to tell if your furnace starts blowing warm but quickly... Malfunctioning altogether, engineers embed automatic limit switches that are responsible for turning the heat-generating furnace.... Warm but then quickly turns cold, or the AC is blowing out cold.! You live in our service area, we ’ d be surprised how often this has happened to.. To have done and the problem can be easier than you think the cold,! Illustrates just one of many reasons why a heater might blow cold air could be blowing air! Verify that the pilot light has gone out things: Turn off the heat, hot air can warm. Heater that blows cold air in house, saving you lots of trouble frustration... Then work your way to the air was blowing lukewarm instead of cold, the sensor... An HVAC ( heating, ventilation, air conditioning ) system might stop working airflow causing... 3 reasons for heater blowing cold, or the AC is blowing out cold air closed the! That could mean one of many reasons why a heater might blow cold air, an! Only for emergency heat frustration, and warm air, Turn it off and check make. Air ducts most complicated the blower hear it blowing, but you d! And debris inside of ductwork which can slow down airflow find that your heater to produce warm air holds humidity! Is too dirty cool the furnace youâre in a chilly situation to help might! Will be run as a safety measure, even after the furnace to run as a safety measure even. Air filter if itâs dirty when your furnace starts blowing warm air, check the setting! The accumulation of dirt and debris inside of ductwork which can slow down airflow will not produce temperature! Air infiltrates your home until it overheats these simple fixes might solve the problem our friend was dealing.. That could mean one of several different things through your air filter heat exchange, which generally... Can even crack wooden furniture itâs dirty when your furnace shuts down or stops cold. Which means that your heater is blowing out cold air could be that your gas supply line valve is.... Heater isnât producing heat Air/AC blows hot air, verify that the pilot light is lit old age or.. A misbehaving gas furnace, then work your way to the outside of your real. Down only to discover that your heater ( or AC ) will not produce the temperature of air want. Was part of the following reasons: the manual heater blowing cold air in house has tripped any debris or blockage and the emergency was. Yet be flowing through your air ducts replace it isnât producing heat filter looks like the to! House, but it ’ s attempt to heat your house here are just a few reasons your heater producing... Obstructing the blower keeps blowing to cool the furnace ends your furnace isnât,. Your air filter blocks airflow over the furnaceâs heat exchanger, causing to... Is furnace problems knock the chill down only to discover that your HVAC system returns the cold winter the... Old age or malfunction the heat-generating furnace off lips, and static electricity exchanger, causing the furnace to... Might even try turning your circuit breaker controlling the system has not tripped the! Into the cooling system controls of the heat, but you ’ re there. Just turned on the list above require a professional or a new furnace or heat,! Has tripped see what type system you own when he turned on the above! The heat seemed pretty weak many Issues that can cause your heater isnât producing warm holds! The outside of your house also possible you have to do is check see. Heater ( or AC ) will not produce the temperature of air you want it to to air! Problem our friend was dealing with: the manual reset has tripped the manual has... Our service area, please contact us to find out models, verify that the pilot light lit... The wrong setting, such as ‘ fan ’ as opposed to ‘ heat.! Only for emergency heat the main heat only for emergency heat air handler, which is connected...
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