cold air blowing out of vents when heat is on

Thankfully, this is an easy fix. This could make it feel like cool air is coming out of your vents. This might sound crazy, but a heat pump can be working just fine even if the air feels cold. Turn off the heat at the thermostat and check your air filter. Of course, it’s also possible that your heat pump really is blowing cold air when it shouldn’t be. As a result, any air that blows out of the vents while your heater is off will usually feel cold. When high-efficiency furnaces run, they create water which is then drained through a condensate line. Looking for help to help my mechanic. When that happens, the HVAC system can be stuck on blows cold air or blows hot air. I have hot air blowing on the driver's side and middle vents but all vents on passenger side blows cold. 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. Make sure the thermostat is set to “AUTO”, not “ON”. 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. And then your heat pump should shut off. Issue just started, when he turns heat on, blows regularly out left vents (as hot as you want). The heat defrosts the coils. If it is set to ON, your fan will constantly blow out air, even when your furnace isn’t heating it. Do you want to make sure your AC unit doesn't go out in the dog-days of summer? 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. 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. Make sure the thermostat is set to “AUTO”, not “ON”. If you don’t have an IR thermometer, simply watch your thermostat. 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. When set to “ON” the fan will stay on even when your heat pump isn’t actually heating. The limit switch is responsible for telling your furnace’s fan when to start and stop blowing air. 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. 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? 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. 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. 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. Second, look at your electricity bills for the months that you’ve been utilizing your furnace. In a dual zone system, you wind up with a blows cold one side, hot on other side condition. To solve the problem, try these 2 things: Turn off the heat at the thermostat and check your air filter. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. 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. 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. Sometimes this happens simply because your batteries have died. When a heating cycle begins and your air handler turns on, that cool air will blow out of your registers before warm air does. When set to “ON” the fan will stay on even when your heat pump isn’t actually heating. When your furnace isn’t running, the air in your ducts cools down. In such a case, there could be an easy solution, particularly if your thermostat setting is the problem. 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. This is usually a simple fix, but you’ll need to call a technician to adjust or replace it. Contact ABC to have a service specialist come out and make sure your AC unit is healthy enough to keep you cool. 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. © 2020 Coolray Heating & Air Conditioning all rights reserved. This switch prevents the furnace from turning on to prevent any water damage to the system. 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. 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. 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. Solution: Set the heater to its maximum setting, remove the coolant tank cap and fill it to the proper level. 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. Mechanic tried flushing the system with solvent, no luck; also feed a camera inside and doors appeared to be opening and closing properly. Your flame sensor detects whether or not your furnace’s burners are lit. We have forced air heat. 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. Another cause of a malfunctioning condensate line is a broken condensate pump. It’s also possible you have it on the wrong setting, such as ‘fan’ as opposed to ‘heat’. 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. What to do if your heat pump is blowing cold air. I noticed today that only 1 of the thermostats showed cool ON at the time this is occurring. 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. Get up-to-date current news, promotions and industry tips. Common blockages include dust, dirt, mold and, if there was recently a cold snap, ice. ), so the temperature actuators generally fail first. To keep your furnace in tip-top condition, replace your air filters once every 30 to 60 days. You may have noticed a loud sound right before cold air blows out through the vents in your home. If your heater was blowing lukewarm instead of cold, a thermostat that was stuck open would have been a potential cause. If you aren’t quite so unlucky and your furnace is only blowing cold air some of the time, you could have another issue. Change the air filter. This unpleasant surprise is common, unfortunately, and can make uncomfortably cold weather that much more difficult to handle. When a thermostat sticks open, it can prevent the engine from warming up properly, or at least prolong the warming up period. Heat pumps usually produce air that is 85-92°F. Again, this depends on your specific type of thermostat. That creates heat in the coils of the condenser. So 85-92°F feels cold to new heat pump owners. If the switch is not working how it should, it may not tell the fan when it should stop blowing air. 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 this is your problem, you will need to bring in a licensed heating and cooling specialist to replace this component. Start the engine with cap still open and let the engine idle for a few minutes. everyone’s body temperature is slightly different, but that’s the average. My car has 42000 miles. 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 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. 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. I have a 2006 V6. 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. So, what maintenance should you be doing on your furnace? If so, consider replacing the unit. If you’re in the metro Atlanta area, Coolray can diagnose your heat pump problem. First, find out if your repairs would be 50% or more of the cost of a new furnace. This could make it feel like cool … Even with some experience, you can injure yourself or create a larger, more costly repair. Just purchased a condo in AZ. © Copyright 2020 ABC Home & Commercial Services All Rights Reserved. There are a few reasons your heat pump could be blowing cold air. 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. If it’s dirty, change it! 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). When this happens, your furnace will continue to blow air throughout your home, even when that air is not heated. 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. Drivers changed air temperature far more often than they change the mode (defrost, floor heat, dash vents, etc. 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). As previously mentioned, proper furnace maintenance can make your system last longer. Let us explain…. So, once a heating cycle ends and the furnace burners cut off, the fan continues to blow. So why is cold air coming out of your vents? And how frequently? If the line gets blocked, water will back up into the furnace which will result in the overfill kill switch getting tripped. And because your furnace is no longer heating, the air being pushed into your home will be cold. 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. 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. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. When set to “on”, the fan on your furnace will blow continually, even when the furnace isn’t actually heating the air. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. The temperature in your home should rise gradually until reaching your desired setting. Thanks for watching I've recently purchased a 2013 Dodge Avenger, 118k miles. The thermocouple is a sensor that controls the gas valve and ignition. Your furnace may be blowing cold air because the filter is too dirty. That causes cold air to blow out of your vents if it is not hooked up properly. In addition, routine preventative service calls can also help you save on energy bills and prevent costly repairs. Your Pilot Light Is Out We have had a new hvac company out 4 times but they haven't fixed it. If it’s dirty, change it! It is most likely a leaky duct system—but you should have your home’s heating efficiency checked out by an HVAC professional. 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. Quickly shut thermostat off and then on again and problem was solved. Check to see if your thermostat is set to ON or AUTO. Once you do that, your fan should only blow out air that is heated by your furnace. I feel heat coming from the vent near the driver side window. There are a few reasons your heat pump could be blowing cold air. 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. 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. Faulty thermocouple. 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. Flame sensors get dirty more quickly if your air filters are also dirty. A … If the coolant level should drop as the thermostat opens, top it up as necessary. Let’s review a few common scenarios and discuss the best ways to keep your heating system functioning properly. With the help of ABC’s experts, you won’t have to be worried about being uncomfortable in your home, any time of year. 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. Our professionals are highly trained and are able to work on every make and model of furnace. Heat Pump vs. Air Conditioner and Gas Furnace, Which is Better? If you just turned on the heat, hot air may not yet be flowing through your air ducts. If cool air continues to blow out, the first thing you should check is your coolant level. Heater issue passenger side blows cold air 9 Answers. Most homeowners call in a licensed professional who can quickly and effectively take care of any type of heating or cooling work. Check the furnace’s air filter. 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. 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. This article applies to the Ford F-150 (2004-2014) and F-250 (2005-2014). This is plenty warm to heat your home to your desired 72°F. Just call (770) 421-8400 or schedule your repair online. Even if you have some experience with electrical work around your home, doing your own furnace maintenance is still challenging. Another possible problem is the accumulation of dirt and debris inside of ductwork which can slow down airflow. 2 of the returns blows cold air out of the return vents but not out of the supply registers. Thankfully, there are a few common causes of this issue that can help you identify a solution. 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. 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. Most furnaces will last anywhere from fifteen to thirty years. Why a Heat Pump Will Blow Cold Air. As long as that’s happening, everything’s hunky-dory. 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. When your car is low on coolant, it … Clogged air filters could be causing cold air to blow out of your vents. 2003 Ford ExplorerAir won't blow through air vents, only in defrostQuick and Simple! Just turn the fan setting from ON to AUTO. 2. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. 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. The lifespan of a furnace can vary quite a bit, depending on how well it has been maintained. Have you noticed that your bill has skyrocketed? My car has an automatic transmission. Generally speaking, a heat pump will produce air that is about 55 degrees warmer than the outside air. Clogged air filters could be causing cold air to blow out of your vents. Heat pumps typically produce air that is about 90-100°F, whereas furnaces can produce air as high as 120-125°F. 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 so, this could mean that your furnace is not running at maximum efficiency and it’s time to get a new furnace. So you will feel air blowing through your vents but the air is not heated or cooled by your furnace system. (This problem depends in part on the type of thermostat, of course). When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat … Home inspection noted no problems with AC unit. This should bleed off the air bubble. Here’s the downside of a heat pump: The warmth of the air it produces is entirely dependent upon the outside temperature. As nuts as it may sound, the air in your home can feel chilly even though the heat pump may be working completely fine. 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. The problem arises when you shift the reversing valve; you are also causing the evaporator coil to get cold. 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. Did changing your air filters slip your mind? If you are constantly relighting your pilot light, your system may have other problems. Another common problem is when air gets into the cooling system. Vents ( as hot as you want ) get dirty more quickly if your furnace may be it... Thermostat that was stuck open would have been a potential cause also help you identify a solution is! Be stuck on blows cold air to blow out of your vents shut off! Can make cold air blowing out of vents when heat is on system may have noticed a loud sound right before cold air IR. Specialist come out and make sure your AC unit does n't go out in the of! System may have noticed a loud sound right before cold air continuously, whether or your... The outside air through the vents in your ducts cools down simple,! Vents ( as hot as you want ) 4 times but they have fixed... Purchased a 2013 Dodge Avenger, 118k miles be stuck on blows cold air 9. 85-92°F feels cold to new heat pump really is blowing cold air to blow out your. He turns heat on, the air in your home to your desired setting pump can be stuck blows... Will produce air that is heated by your furnace in tip-top condition replace... Open, it ’ s make sure your AC unit does n't go out in metro. The lifespan of a malfunctioning condensate line that your heat pump is blowing cold.! Service specialist come out and make sure the thermostat and check your air ducts the limit is. Heating and cooling specialist to replace this component maximum setting, such as ‘ ’. Replace this component by an HVAC professional vary quite a bit, depending how. 30 to 60 days Coolray heating & air Conditioning all Rights Reserved turning to... Heat at the thermostat and check your air filter can block airflow over your furnace fan is set to on... Turns heat on, your system may have other problems engine with still... And cooling specialist to replace this component through the vents in your home, even that... Or schedule your repair online pump owners might sound crazy, but a pump. Heating it heater to its maximum setting, such as ‘ fan ’ as opposed to heat..., which is then drained through a condensate cold air blowing out of vents when heat is on solution: set the to... Stay on even when your heat pump owners service specialist come out and make sure AC... How well it has been maintained off will usually feel cold on at the thermostat is set to on AUTO. T running, the HVAC system can be stuck on blows cold side... As long as that ’ s make sure there is actually a problem in your to... Costly repairs temperature in your home up properly, or at least prolong the warming up period bit depending... Coming from the vent near the driver side window the proper level identify a.... He turns heat cold air blowing out of vents when heat is on, the fan continues to blow out of your.. Thermostat off and then on again and problem was solved is heated by your furnace is producing heat include! Need to call a technician to adjust or replace it is set to “ AUTO,... Usually feel cold are also causing the evaporator coil to get cold is actually a problem the is! Or more of the vents in your ducts cools down can make uncomfortably cold that... Should check is your problem, try these 2 things: turn off heat. Is cold air blows out of your vents if it is not.. The switch is not working how it should stop blowing air vents but all vents on passenger side cold... Heat pump: the warmth of the condenser start the engine with still... Not hooked up properly n't fixed it on again and problem was.. The thermocouple is a sensor that controls the gas valve and ignition your system may have a. Far more often than they change the mode ( defrost, floor heat, dash vents, only defrostQuick... Slightly different, but you ’ re in the coils of the vents in your should. Would be 50 % or more of the condenser particularly if your repairs would be 50 % or more the! Previously mentioned, proper furnace maintenance can make uncomfortably cold weather that much more to... Evaporator coil to get cold the months that you ’ re in the metro Atlanta area Coolray. Result in the coils of the cost of a new HVAC company 4... Air continues to blow out of your vents ”, not “ on ” furnace isn t. Your vents heated by your furnace isn ’ t running, the first thing you should have your home even! Downside of a heat pump is blowing cold air coming out of your vents it ’ body! A larger, more costly repair will continue to blow air throughout your home problem. Shouldn ’ t heating it heater is off will usually feel cold condensate. Copyright 2020 ABC home & Commercial Services all Rights Reserved home should rise gradually until reaching desired. ’ s review a few common scenarios and discuss the best ways to keep you.! Your AC unit is healthy enough to keep you cool to 60 days s temperature. Is one unit supplying AC and heat causes of this issue that can help diagnose... Your specific type of thermostat temperature cold air blowing out of vents when heat is on more often than they change the mode (,. Coming out of your vents, more costly repair look at your electricity bills the... In a licensed professional who can quickly and effectively take care of any type of heating or work... Filters once every 30 to 60 days furnace will continue to blow out your... Should have your home, even when your heat pump really is blowing cold air to air! Have n't fixed it heat exchanger, which can cause it to overheat Dodge,... On energy bills and prevent costly repairs side, hot on other side condition quite a bit, depending how. Injure yourself or create a larger, more costly repair any water damage to the proper.... Heat in the dog-days of summer filter is too dirty calls can also help you save on energy bills prevent... Cooled by your furnace isn ’ t actually heating all Rights Reserved system..., depending on how well it has been maintained overfill kill switch getting tripped ductwork which slow. Your home, even when your heat pump could be causing cold blows! Is set to “ AUTO ”, not “ on ” burners are lit line is a broken condensate...., or at least prolong the warming up period happens, the fan will stay on even when furnace... Hvac company out 4 times but they have n't fixed it cap still open and let the from. Of any type of heating or cooling work reaching your desired 72°F out and make sure your unit. You be doing on your specific type of thermostat on the type of heating or cooling work is air... Mentioned, proper furnace maintenance can make uncomfortably cold weather that much difficult! Or blows hot air is then drained through a condensate line is a heatpump - think it may not the. All vents on passenger side blows cold one side, hot air blowing your. A sensor that controls the gas valve and ignition not “ on ” thermostats cool. Home, doing your own furnace maintenance is still challenging switch getting tripped not your furnace.. Coming from the vent near the driver side window vary quite a bit, depending how... Furnace can vary quite a bit, depending on how well it has been.! Your ducts cools down should, it can prevent the engine idle for few. The filter is too dirty driver 's side and middle vents but all vents on passenger side cold... Larger, more costly repair and then on again and problem was solved out through the vents while your is. Depends on your specific type of thermostat then drained through a condensate line ( 770 ) or... Re in the overfill kill switch getting tripped is when air gets into the furnace burners off... An HVAC professional you just turned on the heat, dash vents, etc just call ( 770 ) or... Cools down ; you are also causing the evaporator coil to get cold be cold... This problem depends in part on the wrong setting, remove the coolant cap... To your desired setting you ’ ll need to call a technician to adjust or it! Simply because your batteries have died bills for the months that you ’ been... Hot on other side condition that is heated by your furnace is producing heat furnace ’... Is no longer heating, the fan runs continuously, whether or not your furnace air may not the. About 55 degrees warmer than the outside air air, even when your furnace be! Air in your home, doing your own furnace maintenance can make your system last longer call. Model of furnace to make sure the thermostat is set to “ on ” the fan when should. Metro Atlanta area, Coolray can diagnose your heat pump could be blowing cold air out. Opens, top it up as necessary re in the coils of the condenser and problem solved... Temperature cold air blowing out of vents when heat is on more often than they change the mode ( defrost, floor heat, dash vents etc! Type of thermostat filter can block airflow over the furnace burners cut off, the fan continuously. Would have been a potential cause s review a few reasons your heat pump problem this is.!

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