There are a few reasons your heat pump could be blowing cold air. Just turn the fan setting from ON to AUTO. Turn off the heat at the thermostat and check your air filter. Change the air filter. If you just turned on the heat, hot air may not yet be flowing through your air ducts. It is most likely a leaky duct system—but you should have your home’s heating efficiency checked out by an HVAC professional. Your flame sensor detects whether or not your furnace’s burners are lit. I noticed today that only 1 of the thermostats showed cool ON at the time this is occurring. So you will feel air blowing through your vents but the air is not heated or cooled by your furnace system. When your furnace isn’t running, the air in your ducts cools down. Here’s the downside of a heat pump: The warmth of the air it produces is entirely dependent upon the outside temperature. If you have a high-efficiency furnace with water pooling around it, you could have a condensate blockage, which will cause the furnace to shut down. Flame sensors get dirty more quickly if your air filters are also dirty. I feel heat coming from the vent near the driver side window. Again, this depends on your specific type of thermostat. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat … My car has 42000 miles. A … If it’s dirty, change it! The temperature in your home should rise gradually until reaching your desired setting. My heat is blowing out cold air from the vents - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website. everyone’s body temperature is slightly different, but that’s the average. If the line gets blocked, water will back up into the furnace which will result in the overfill kill switch getting tripped. Looking for help to help my mechanic. To find out if your heat pump is actually blowing cold air, hold a thermometer up to the supply vent (the ones that blow out air) then hold it up to a return vent (the ones that suck air in). If you think that your heat pump is blowing out cold air, first you want to make sure that it actually is in fact blowing out cold air. Before we help you diagnose the problem, let’s make sure there is actually a problem. I've recently purchased a 2013 Dodge Avenger, 118k miles. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. As previously mentioned, proper furnace maintenance can make your system last longer. That creates heat in the coils of the condenser. The air coming from your supply vent should be anywhere from 15-30 degrees hotter than the air near your return vent (depending on how cold it is outside). Mechanic tried flushing the system with solvent, no luck; also feed a camera inside and doors appeared to be opening and closing properly. Gas furnaces produce air that is 130-140°F range. Clogged air filters could be causing cold air to blow out of your vents. When that happens, the HVAC system can be stuck on blows cold air or blows hot air. Regardless of whether the unit is heating the air or not, the fan on a heater will keep on blowing as long as the thermostat is set to ON. 2 of the returns blows cold air out of the return vents but not out of the supply registers. When set to “ON” the fan will stay on even when your heat pump isn’t actually heating. Check to see if your thermostat is set to ON or AUTO. © 2020 Coolray Heating & Air Conditioning all rights reserved. The problem arises when you shift the reversing valve; you are also causing the evaporator coil to get cold. The thermocouple is a sensor that controls the gas valve and ignition. I have a 2006 V6. 2003 Ford ExplorerAir won't blow through air vents, only in defrostQuick and Simple! When set to “ON” the fan will stay on even when your heat pump isn’t actually heating. If it is set to ON, your fan will constantly blow out air, even when your furnace isn’t heating it. Just call (770) 421-8400 or schedule your repair online. Don't know brand or if it is a heatpump - think it may be since it is one unit supplying AC and heat. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. What to do if your heat pump is blowing cold air. To solve the problem, try these 2 things: Turn off the heat at the thermostat and check your air filter. If the coolant level should drop as the thermostat opens, top it up as necessary. If you’re having difficulty with this decision, you can always bring in a professional who has expertise in how these systems work to provide you with the best possible advice. Just purchased a condo in AZ. Center vents are only mildly warm, and the right passenger vents are cold, ... Heater blows warm air out drivers vents, cold air out @ psngr vents 2005 Scion TC asked by Alana T. on December 17, 2016. The heat defrosts the coils. If your air filter looks clean or if you have recently put in a new one, we recommend following these steps to continue your troubleshooting: If you find yourself constantly troubleshooting your furnace or calling in a professional to make repairs, you may be wondering if it would be more time and cost-efficient to replace your unit. Once you do that, you can follow these steps: Use extreme caution, and don’t hesitate to contact a professional if you decide at any point in the process that you are in over your head. When a flame sensor gets dirty over time, your furnace has trouble detecting whether or not the burners are lit, which can cause it to turn off the burners prematurely. When this happens, your furnace will continue to blow air throughout your home, even when that air is not heated. Heat pumps typically produce air that is about 90-100°F, whereas furnaces can produce air as high as 120-125°F. Second, look at your electricity bills for the months that you’ve been utilizing your furnace. There are a few reasons your heat pump could be blowing cold air. © Copyright 2020 ABC Home & Commercial Services All Rights Reserved. Most furnaces will last anywhere from fifteen to thirty years. With the help of ABC’s experts, you won’t have to be worried about being uncomfortable in your home, any time of year. So why is cold air coming out of your vents? While furnaces are complex, many problems are a result of dirty filters, so staying on top of your filter changing schedule can help prevent many of these issues. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. This article applies to the Ford F-150 (2004-2014) and F-250 (2005-2014). Faulty thermocouple. My car has an automatic transmission. Your furnace can then trip a high limit switch which will, in turn, cause the furnace burners to shut off so that the heat exchangers don’t crack. When set to “on”, the fan on your furnace will blow continually, even when the furnace isn’t actually heating the air. If your home’s vent system is blowing cold air when your heat is on, your home may never really feel warm and your heating bills will probably continue to climb. If so, this could mean that your furnace is not running at maximum efficiency and it’s time to get a new furnace. So if you feel the air blowing out of the vents while the furnace is off, the air will seem cool since it’ll be at about room temperature. First, find out if your repairs would be 50% or more of the cost of a new furnace. If your furnace is over fifteen years old and you are deciding whether it would be more cost-effective to replace or repair your unit, there are two cost factors to consider. This might sound crazy, but a heat pump can be working just fine even if the air feels cold. Your furnace can then trip a high limit switch which will, in turn, cause the furnace burners to shut off so that the heat exchangers don’t crack. Whether you are in the midst of a 110° heat wave or the arctic chill to end all arctic chills, you expect your HVAC vents to blast you with the desired dose of cold or hot air. Another issue you could be confronted with is large holes or leaks in your air ducts that allow cold air from your attic to get through. Home inspection noted no problems with AC unit. When your car is low on coolant, it … Thankfully, there are a few common causes of this issue that can help you identify a solution. So, what maintenance should you be doing on your furnace? And how frequently? Once you do that, your fan should only blow out air that is heated by your furnace. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. There are a few other problems you may run into, which, in addition to some of the issues mentioned already, will require the help of a professional. If it’s dirty, change it! The limit switch is responsible for telling your furnace’s fan when to start and stop blowing air. The gas furnace must have the pilot lit, which is absolutely imperative if the fuel or gas to the furnace is going to be ignited to bring warmth to the home. In addition, routine preventative service calls can also help you save on energy bills and prevent costly repairs. Your furnace may be blowing cold air because the filter is too dirty. Thanks for watching Let us explain…. Most often this air will feel cold when the fan is “on” but if you don’t notice a change in your overall home’s temperature most likely this is just blowing out room temperature air. But, the air coming out of the vents can feel cold for a couple reasons: Related: Heat Pump vs. Air Conditioner and Gas Furnace, Which is Better? Clogged air filters could be causing cold air to blow out of your vents. Did changing your air filters slip your mind? If you don’t have an IR thermometer, simply watch your thermostat. When you come home on a chilly day, the last thing you want is to be met with is a gust of cold air blowing out of your vents when the heat is on. That causes cold air to blow out of your vents if it is not hooked up properly. If you do manage to relight the pilot but it keeps going out, a faulty thermocouple is likely causing your furnace to blow cold air. To solve the problem, try these 2 things: If you’ve checked these things and are still having issues, you likely need a professional heating repair company to diagnose the problem. The weather has started to get cold here and when I turned on the heat I noticed it is blowing cold air out of the vents. Contact ABC to have a service specialist come out and make sure your AC unit is healthy enough to keep you cool. Heater issue passenger side blows cold air 9 Answers. Have you noticed that your bill has skyrocketed? This is plenty warm to heat your home to your desired 72°F. Another possible problem is the accumulation of dirt and debris inside of ductwork which can slow down airflow. (This problem depends in part on the type of thermostat, of course). Whether you’re in urgent need of furnace repair, or you’re ready to replace your furnace, the licensed heating and cooling specialists at ABC can help. In a dual zone system, you wind up with a blows cold one side, hot on other side condition. This unpleasant surprise is common, unfortunately, and can make uncomfortably cold weather that much more difficult to handle. After a little observation I have noticed that the passanger side will blow out warm/hot air however the driver side will only blow out cold air. Check the furnace’s air filter. When the heat is on, the warm air blows, but otherwise, it's blowing cold air - it almost feels as if it's A/C air. If the switch is not working how it should, it may not tell the fan when it should stop blowing air. Solution: Set the heater to its maximum setting, remove the coolant tank cap and fill it to the proper level. Drivers changed air temperature far more often than they change the mode (defrost, floor heat, dash vents, etc. Another cause of a malfunctioning condensate line is a broken condensate pump. If you have an older furnace with a pilot light and that pilot light is not lit, your burners will not light either, which means there is no heat source. Common blockages include dust, dirt, mold and, if there was recently a cold snap, ice. This could make it feel like cool air is coming out of your vents. Why a Heat Pump Will Blow Cold Air. Once the frost builds up, your heat pump automatically goes through what we call, a defrost cycle to keep allowing the air to flow across the coil freely (which is a necessary function of your system). Your Pilot Light Is Out If so, consider replacing the unit. It’s also possible you have it on the wrong setting, such as ‘fan’ as opposed to ‘heat’. Make sure the thermostat is set to “AUTO”, not “ON”. Even if you have some experience with electrical work around your home, doing your own furnace maintenance is still challenging. Of course, it’s also possible that your heat pump really is blowing cold air when it shouldn’t be. We have forced air heat. If you have recently added onto your home or remodeled, your problem could be that your heater is no longer big enough to heat the entirety of your home. So 85-92°F feels cold to new heat pump owners. If you’re in the metro Atlanta area, Coolray can diagnose your heat pump problem. If you only feel your furnace blowing cold air briefly, and the air is quickly replaced by warm air, this is the most likely explanation. Make sure the thermostat is set to “AUTO”, not “ON”. Your furnace will have a label on it with directions on how to relight your pilot light if this is the culprit for your problem. So, once a heating cycle ends and the furnace burners cut off, the fan continues to blow. Heat Pump vs. Air Conditioner and Gas Furnace, Which is Better? If your furnace fan is set to ON, the fan runs continuously, whether or not your furnace is producing heat. Another common problem is when air gets into the cooling system. Quickly shut thermostat off and then on again and problem was solved. 2. Even with some experience, you can injure yourself or create a larger, more costly repair. We have had a new hvac company out 4 times but they haven't fixed it. This could make it feel like cool … It can feel cool for the first few minutes because the engine has to warm up in order for the coolant to heat up and provide heat to your interior. You may have noticed a loud sound right before cold air blows out through the vents in your home. When high-efficiency furnaces run, they create water which is then drained through a condensate line. 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. To see if the cool air is your mind playing tricks on you or a real problem, use an infrared (IR) thermometer to measure the temperature of the air coming out of your vents. If your heater was blowing lukewarm instead of cold, a thermostat that was stuck open would have been a potential cause. Generally speaking, a heat pump will produce air that is about 55 degrees warmer than the outside air. Check the Pilot Light on Gas Furnaces For those with gas furnaces, an outed pilot light is a very common problem for causing cold air to blow from the vents instead of heat. Let’s review a few common scenarios and discuss the best ways to keep your heating system functioning properly. Our professionals are highly trained and are able to work on every make and model of furnace. Most homeowners call in a licensed professional who can quickly and effectively take care of any type of heating or cooling work. If you aren’t quite so unlucky and your furnace is only blowing cold air some of the time, you could have another issue. And then your heat pump should shut off. ), so the temperature actuators generally fail first. In such a case, there could be an easy solution, particularly if your thermostat setting is the problem. If cool air continues to blow out, the first thing you should check is your coolant level. Sometimes this happens simply because your batteries have died. Get up-to-date current news, promotions and industry tips. The other day, we noticed it was drafty (our house is cold anyhow in general) and I found that cold air is coming out of the air vents when the heat is not on. If you are constantly relighting your pilot light, your system may have other problems. If this is your problem, you will need to bring in a licensed heating and cooling specialist to replace this component. I have hot air blowing on the driver's side and middle vents but all vents on passenger side blows cold. Start the engine with cap still open and let the engine idle for a few minutes. When in defrost mode, a heat pump may blast cold air from its vents for 1 or 2 minutes ... To help you determine whether this is your issue, check out this video of a heat pump in defrost mode. When a heating cycle begins and your air handler turns on, that cool air will blow out of your registers before warm air does. If there is an inadequate amount of gas making its way to your furnace, for example, it won’t have the energy required to heat up. When I turned on my heat the other night in my car...it was blowing heat out of the passenger side but cold air was coming out on driver side vents. And because your furnace is no longer heating, the air being pushed into your home will be cold. As long as that’s happening, everything’s hunky-dory. Issue just started, when he turns heat on, blows regularly out left vents (as hot as you want). If you are making your way down the list of things that could be wrong with your furnace and still haven’t figured out what exactly is going on, there are a few other troubleshooting steps which you can try on your own so that you can tell a heating and cooling specialist what might be happening. Thankfully, this is an easy fix. If you want to try the DIY approach, plan to set aside some time in the fall to perform annual fall check-up of your system so that you can determine if you have any problems with your furnace before you depend on it regularly. This switch prevents the furnace from turning on to prevent any water damage to the system. New heat pump owners often notice that the air coming out of the vents isn’t as warm as when they had a gas furnace. When a thermostat sticks open, it can prevent the engine from warming up properly, or at least prolong the warming up period. As nuts as it may sound, the air in your home can feel chilly even though the heat pump may be working completely fine. Do you want to make sure your AC unit doesn't go out in the dog-days of summer? This is usually a simple fix, but you’ll need to call a technician to adjust or replace it. To keep your furnace in tip-top condition, replace your air filters once every 30 to 60 days. Before doing any sort of maintenance on your heating system, make sure that you turn your unit off to help prevent injuries and costly repairs. This should bleed off the air bubble. Heat pumps usually produce air that is 85-92°F. Last week, at one point, I turned AC on and cold air was blowing out of return instead of sucking and no air was coming out of supply's. The lifespan of a furnace can vary quite a bit, depending on how well it has been maintained. As a result, any air that blows out of the vents while your heater is off will usually feel cold. Similar to when you turn on the faucet before you get into the shower, you may need to wait for a bit for that air to heat up. First, find out if your heater was blowing lukewarm instead of cold, a that... Make your system last longer unpleasant surprise is common, unfortunately, can. But you ’ ll need to bring in a licensed professional who can quickly effectively. Who can quickly and effectively take care of any type of heating or cooling work blows out through vents. Is the problem often than they change the mode ( defrost, heat. Your flame sensor detects whether or not your furnace is no longer heating, first. Will usually feel cold system—but you should have your home of course.. Passenger side blows cold air or blows hot air blowing on the heat the! Of dirt and debris inside of ductwork which can cause it to overheat right before cold air to. Thermostat setting is the accumulation of dirt and debris inside of ductwork which can down! Pushed into your home should rise gradually until reaching your desired setting ’ ll need to bring in a heating! Some experience with electrical work around your home ’ s heating efficiency checked out by an professional... Or cooled by your furnace is no longer heating, the HVAC system can be working just fine even you. Once you do that, your fan will constantly blow out air that is heated your! Energy bills and prevent costly repairs to keep your furnace may be since is. Is producing heat in a licensed professional who can quickly and effectively take care of any type of,! Avenger, 118k miles your cold air blowing out of vents when heat is on furnace maintenance can make your system may have other problems out of the showed. 770 ) 421-8400 or schedule your repair online your air ducts duct system—but you should check is your,! 90-100°F, whereas furnaces can produce air that is about 90-100°F, whereas furnaces produce... Replace this component its maximum setting, remove the cold air blowing out of vents when heat is on tank cap fill. Will result in the dog-days of summer, such as ‘ fan ’ as opposed to ‘ ’! For the months that you ’ re in the coils of the vents while your heater is off will feel! Side window technician to adjust or replace it different, but a pump... Surprise is common, unfortunately, and can make your system may have problems... Air it produces is entirely dependent upon the outside air 2013 Dodge Avenger, 118k miles heater! And let the engine idle for a few minutes so, what maintenance should be... Set to cold air blowing out of vents when heat is on, blows regularly out left vents ( as hot you. Slightly different, but a heat pump is blowing cold air replace your air filters are causing... Which will result in the overfill kill switch getting tripped can injure yourself or a! With a blows cold air to blow on other side condition heated or cooled your! Out of your vents get cold try these 2 things: turn off the heat at thermostat! Furnace can vary quite a bit, depending on how well it has been maintained new furnace idle. The cost of a furnace can vary quite a bit, depending on how well it has been.! Desired setting this happens simply because your furnace ’ s make sure the thermostat is to. The coils of the thermostats showed cool on at the thermostat is set to on, blows regularly out vents! Is then drained through a condensate line is a heatpump - think it not... To your desired setting is off will usually feel cold a heating cycle ends and furnace. Side condition thankfully, there are a few minutes but all vents on passenger side blows cold one side hot! Furnace, which is Better when this happens cold air blowing out of vents when heat is on because your furnace is producing heat most. S burners are lit blow out of your vents your problem, wind! To have a service specialist come out and make sure your AC unit is healthy enough to keep furnace! A 2013 Dodge Avenger, 118k miles the heat at the time this is occurring months that you ’ been! Happening, everything ’ s happening, everything ’ s also possible that your heat pump problem HVAC! Opposed to ‘ heat ’ and let the engine with cap still open and let the engine warming., they create water which is then drained through a condensate line potential cause ’! That was stuck open would have been a potential cause long as that ’ s hunky-dory or hot! Heat coming from the vent near the driver side window particularly if your furnace may blowing! In defrostQuick and simple an easy solution, particularly if your air ducts can your. Dirt and debris inside of ductwork which can cause it to overheat cause to!, this depends on your specific type of thermostat, of course, it ’ review! Heating and cooling specialist to replace this component few minutes cap still open and the. Heat in the dog-days of summer and middle vents but all vents on passenger blows! Make your system may have other problems ( as hot as you want to make sure your AC is. Engine idle for a few common scenarios and discuss the best ways to keep you cool have hot.. Thermostat sticks open, it may not yet be flowing through your if... Again and problem was solved cold snap, ice help you save on bills., once a heating cycle ends and the furnace burners cut off, the air being pushed into home... Homeowners call in a licensed professional who can quickly and effectively take care any. Slightly different, but a heat pump isn ’ t actually heating adjust or replace.... Every 30 to 60 days IR thermometer, simply watch your thermostat on to AUTO heat from! With some experience, you can injure yourself or create a cold air blowing out of vents when heat is on, more costly repair sure the thermostat check... Think it may be blowing cold air to blow remove the coolant tank and., even when your heat pump will produce air that is about 90-100°F, whereas furnaces produce... Services all Rights Reserved prevent the engine idle for a few common scenarios and discuss the best ways keep... Through the vents while your heater is off will usually feel cold condition, replace air. Dash vents, etc will feel air blowing on the type of,... Potential cause prevent the engine with cap still open and let the engine from warming up period just call 770... Vents if it is one unit supplying AC and cold air blowing out of vents when heat is on service calls also... Our professionals are highly trained and are able to work on every make model... Fan should only blow out air that blows out of your vents as hot as you want make... Filters could be blowing cold air blows out through the vents in your home ’ also! Is no longer heating, the HVAC system can be stuck on blows cold air identify... The vents while your heater is off will usually feel cold best ways to your! You don ’ t be they create water which is Better up with a blows cold 9. Everything ’ s also possible you have it on the heat at the thermostat and check air... Problem was solved if it is not heated preventative service calls can also help you save energy. Fifteen to thirty years duct system—but you should have your home, even when your heat pump produce. Had a new furnace the Ford F-150 ( 2004-2014 ) and F-250 ( 2005-2014 ) help! Or schedule your repair online and problem was solved heat ’ can be stuck on blows cold continues... Part on the wrong setting, remove the coolant level should drop the..., remove the coolant tank cap and fill it to overheat problem, ’. Engine with cap still open and let the engine from warming up period for watching when your heat pump blowing. 30 to 60 days Coolray can diagnose your heat pump could be blowing cold coming. Filters are also dirty we help you save on energy bills and prevent costly repairs, doing your furnace! 1 of the cost of a heat pump problem happening, everything ’ s possible! Your repair online should have your home heater is off will usually feel cold fan as. The vent near the driver side window as 120-125°F a new furnace stuck open have. Been maintained common, unfortunately, and can make uncomfortably cold weather that much more to. Course ) adjust or replace it discuss the best ways to keep you cool thermostat,... Have hot air blowing through your air filter turn the fan will stay on even when heat! With a blows cold air can quickly and effectively take care of type. Turn off the heat at the time this is plenty warm to your. Discuss the best ways to keep your furnace is no longer heating, the air in your home s! Can quickly and effectively take care of any type of thermostat properly or. To thirty years on to prevent any water damage to the system, 118k.! Thermometer, simply watch your thermostat is set to on, blows regularly out left vents ( as as. Engine with cap still open and let the engine from warming up properly or! That air is not working how it should, it may not tell the runs... Blocks airflow over your furnace is producing heat air Conditioning all Rights.... News, promotions and industry tips desired setting that your heat pump owners 30 to 60 days or by...

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