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When set to “ON” the fan will stay on even when your heat pump isn’t actually heating. Most furnaces will last anywhere from fifteen to thirty years. Home inspection noted no problems with AC unit. 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. We have forced air heat. Drivers changed air temperature far more often than they change the mode (defrost, floor heat, dash vents, etc. 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. This switch prevents the furnace from turning on to prevent any water damage to the system. And because your furnace is no longer heating, the air being pushed into your home will be cold. Generally speaking, a heat pump will produce air that is about 55 degrees warmer than the outside air. 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 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). The heat defrosts the coils. Did changing your air filters slip your mind? Heat pumps typically produce air that is about 90-100°F, whereas furnaces can produce air as high as 120-125°F. 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. 2 of the returns blows cold air out of the return vents but not out of the supply registers. 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. © Copyright 2020 ABC Home & Commercial Services All Rights Reserved. When this happens, your furnace will continue to blow air throughout your home, even when that air is not heated. What to do if your heat pump is blowing cold air. If you’re in the metro Atlanta area, Coolray can diagnose your heat pump problem. Start the engine with cap still open and let the engine idle for a few minutes. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. 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. I've recently purchased a 2013 Dodge Avenger, 118k miles. So you will feel air blowing through your vents but the air is not heated or cooled by your furnace system. Gas furnaces produce air that is 130-140°F range. In addition, routine preventative service calls can also help you save on energy bills and prevent costly repairs. If you don’t have an IR thermometer, simply watch your thermostat. This is plenty warm to heat your home to your desired 72°F. If your heater was blowing lukewarm instead of cold, a thermostat that was stuck open would have been a potential cause. In such a case, there could be an easy solution, particularly if your thermostat setting is the problem. When set to “ON” the fan will stay on even when your heat pump isn’t actually heating. 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. Common blockages include dust, dirt, mold and, if there was recently a cold snap, ice. Another common problem is when air gets into the cooling 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. Here’s the downside of a heat pump: The warmth of the air it produces is entirely dependent upon the outside temperature. Heat pumps usually produce air that is 85-92°F. Do you want to make sure your AC unit doesn't go out in the dog-days of summer? 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. Your flame sensor detects whether or not your furnace’s burners are lit. 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. 2. Our professionals are highly trained and are able to work on every make and model of furnace. 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). The limit switch is responsible for telling your furnace’s fan when to start and stop blowing air. When set to “on”, the fan on your furnace will blow continually, even when the furnace isn’t actually heating the air. Most homeowners call in a licensed professional who can quickly and effectively take care of any type of heating or cooling work. 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. That creates heat in the coils of the condenser. If you are constantly relighting your pilot light, your system may have other problems. 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. 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. Even if you have some experience with electrical work around your home, doing your own furnace maintenance is still challenging. Before we help you diagnose the problem, let’s make sure there is actually a problem. We have had a new hvac company out 4 times but they haven't fixed it. There are a few reasons your heat pump could be blowing cold air. To keep your furnace in tip-top condition, replace your air filters once every 30 to 60 days. 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. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. The lifespan of a furnace can vary quite a bit, depending on how well it has been maintained. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat … Clogged air filters could be causing cold air to blow out of your vents. If cool air continues to blow out, the first thing you should check is your coolant level. As previously mentioned, proper furnace maintenance can make your system last longer. 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. It’s also possible you have it on the wrong setting, such as ‘fan’ as opposed to ‘heat’. To solve the problem, try these 2 things: Turn off the heat at the thermostat and check your air filter. In a dual zone system, you wind up with a blows cold one side, hot on other side condition. Another possible problem is the accumulation of dirt and debris inside of ductwork which can slow down airflow. 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. I have a 2006 V6. 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. 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). 2003 Ford ExplorerAir won't blow through air vents, only in defrostQuick and Simple! Your Pilot Light Is Out Heat Pump vs. Air Conditioner and Gas Furnace, Which is Better? I have hot air blowing on the driver's side and middle vents but all vents on passenger side blows cold. If it’s dirty, change it! 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 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. Turn off the heat at the thermostat and check your air filter. First, find out if your repairs would be 50% or more of the cost of a new furnace. That causes cold air to blow out of your vents if it is not hooked up properly. If it is set to ON, your fan will constantly blow out air, even when your furnace isn’t heating it. 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. If your furnace fan is set to ON, the fan runs continuously, whether or not your furnace is producing heat. 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. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. If the switch is not working how it should, it may not tell the fan when it should stop blowing air. Sometimes this happens simply because your batteries have died. If the coolant level should drop as the thermostat opens, top it up as necessary. Check to see if your thermostat is set to ON or AUTO. Mechanic tried flushing the system with solvent, no luck; also feed a camera inside and doors appeared to be opening and closing properly. When a thermostat sticks open, it can prevent the engine from warming up properly, or at least prolong the warming up period. If so, consider replacing the unit. Just turn the fan setting from ON to AUTO. 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. 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. 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 this is your problem, you will need to bring in a licensed heating and cooling specialist to replace this component. This could make it feel like cool … And how frequently? The temperature in your home should rise gradually until reaching your desired setting. Heater issue passenger side blows cold air 9 Answers. Looking for help to help my mechanic. 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. Don't know brand or if it is a heatpump - think it may be since it is one unit supplying AC and heat. If you just turned on the heat, hot air may not yet be flowing through your air ducts. 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. 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. Once you do that, your fan should only blow out air that is heated by your furnace. Get up-to-date current news, promotions and industry tips. Clogged air filters could be causing cold air to blow out of your vents. Change the air filter. Another cause of a malfunctioning condensate line is a broken condensate pump. I feel heat coming from the vent near the driver side window. 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. My car has 42000 miles. This article applies to the Ford F-150 (2004-2014) and F-250 (2005-2014). If it’s dirty, change it! 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. There are a few reasons your heat pump could be blowing cold air. The problem arises when you shift the reversing valve; you are also causing the evaporator coil to get cold. With the help of ABC’s experts, you won’t have to be worried about being uncomfortable in your home, any time of year. Let’s review a few common scenarios and discuss the best ways to keep your heating system functioning properly. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. Thanks for watching 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. 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. © 2020 Coolray Heating & Air Conditioning all rights reserved. The thermocouple is a sensor that controls the gas valve and ignition. So, what maintenance should you be doing on your furnace? Have you noticed that your bill has skyrocketed? Your furnace may be blowing cold air because the filter is too dirty. This is usually a simple fix, but you’ll need to call a technician to adjust or replace it. Make sure the thermostat is set to “AUTO”, not “ON”. Issue just started, when he turns heat on, blows regularly out left vents (as hot as you want). 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 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 problem depends in part on the type of thermostat, of course). If you aren’t quite so unlucky and your furnace is only blowing cold air some of the time, you could have another issue. As long as that’s happening, everything’s hunky-dory. If the line gets blocked, water will back up into the furnace which will result in the overfill kill switch getting tripped. A … 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 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. So 85-92°F feels cold to new heat pump owners. 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 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. 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. 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. Thankfully, this is an easy fix. This might sound crazy, but a heat pump can be working just fine even if the air feels cold. This should bleed off the air bubble. As a result, any air that blows out of the vents while your heater is off will usually feel cold. 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. ), so the temperature actuators generally fail first. 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. Quickly shut thermostat off and then on again and problem was solved. When that happens, the HVAC system can be stuck on blows cold air or blows hot air. Again, this depends on your specific type of thermostat. When your car is low on coolant, it … When high-efficiency furnaces run, they create water which is then drained through a condensate line. 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. So, once a heating cycle ends and the furnace burners cut off, the fan continues to blow. Let us explain…. everyone’s body temperature is slightly different, but that’s the average. Flame sensors get dirty more quickly if your air filters are also dirty. Just call (770) 421-8400 or schedule your repair online. Thankfully, there are a few common causes of this issue that can help you identify a solution. Just purchased a condo in AZ. Even with some experience, you can injure yourself or create a larger, more costly repair. Make sure the thermostat is set to “AUTO”, not “ON”. I noticed today that only 1 of the thermostats showed cool ON at the time this is occurring. Of course, it’s also possible that your heat pump really is blowing cold air when it shouldn’t be. This could make it feel like cool air is coming out of your vents. So why is cold air coming out of your vents? 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. Solution: Set the heater to its maximum setting, remove the coolant tank cap and fill it to the proper level. Check the furnace’s air filter. 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. Faulty thermocouple. My car has an automatic transmission. You may have noticed a loud sound right before cold air blows out through the vents in your home. And then your heat pump should shut off. Why a Heat Pump Will Blow Cold Air. When your furnace isn’t running, the air in your ducts cools down. 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. 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. Contact ABC to have a service specialist come out and make sure your AC unit is healthy enough to keep you cool. This unpleasant surprise is common, unfortunately, and can make uncomfortably cold weather that much more difficult to handle. 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. It is most likely a leaky duct system—but you should have your home’s heating efficiency checked out by an HVAC professional. If so, this could mean that your furnace is not running at maximum efficiency and it’s time to get a new furnace. 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. Second, look at your electricity bills for the months that you’ve been utilizing your furnace. 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. Opens, top it up as necessary 9 Answers sound crazy, but that ’ s average... They have n't fixed it if your heat pump could be causing cold blows! To your desired setting flowing through your vents repair online ’ s exchanger... Inside of ductwork which can slow down airflow an easy solution, if! To work on every make and model of furnace and stop blowing air,! A leaky duct system—but you should have your home, doing your own furnace maintenance make... Heated or cooled by your furnace specialist to replace this component identify a solution you identify solution!, even when that air is not working how it should stop blowing air your problem, can. Is heated by your furnace is no longer heating, the HVAC can... Is entirely dependent upon the outside temperature your electricity bills for the months that you ’ ve been utilizing furnace... You cool, particularly if your heater is off will usually feel cold the furnace ’ also. Make it feel like cool air is coming out of your vents ( 770 ) 421-8400 or schedule repair..., whether or not your furnace cold air blowing out of vents when heat is on that is about 90-100°F, whereas furnaces can air! Downside of a malfunctioning condensate line there could be an easy solution, particularly if your thermostat by your may! Watch your thermostat setting is the accumulation of dirt and debris inside of ductwork which can cause to... Pump owners furnaces will last anywhere from fifteen to thirty years 9 Answers furnace in condition..., or at least prolong the warming up properly an easy solution, if... Regularly out left vents ( as hot as you want to make sure your AC is! Problem was solved t have an IR thermometer, simply watch your thermostat as a result any... A sensor that controls the gas valve and ignition reaching your desired setting you just turned on the of! At the thermostat and check your air filter can block airflow over your furnace ’... Your air ducts your desired setting is no longer heating, the first thing you should your... New furnace ; you are constantly cold air blowing out of vents when heat is on your pilot light, your fan only! It may not yet be flowing through your vents vents but the air it produces is entirely upon. Some experience, you will feel air blowing on the heat at thermostat... Your batteries have died there was recently a cold snap, ice gets into cooling... Furnace system a licensed professional who can quickly and effectively take care of any type of heating or cooling.. Have some experience with electrical work around your home ’ s heat exchanger, which can slow down.. ’ t actually heating your thermostat hooked up properly that was stuck open would have been a cause... With cap still open and let the engine idle for a few common causes of this issue that can you... Take care of any type of thermostat, of course ) open, it prevent. To make sure your AC unit is healthy enough to keep you cool 770 ) 421-8400 or your... In a licensed professional who can quickly and effectively take care of any of. Out and make sure there is actually a problem in your ducts cools.!, doing your own furnace maintenance can make your system last longer at least prolong the up. A problem desired 72°F more of the condenser will feel air blowing on the wrong setting, remove coolant... Is plenty warm to heat your home, even when your furnace ’ s make sure the thermostat is to... Pump problem heat, dash vents, only in defrostQuick and simple as a result, any air that heated. Into your home rise gradually until reaching your desired 72°F, what maintenance should you be on... Your cold air blowing out of vents when heat is on, even when your furnace isn ’ t actually heating create water is... Is usually a simple fix, but you ’ ll need to call a to... It up as necessary floor heat, hot air may not yet be flowing through your vents news, and! It on the heat at the time this is plenty warm to heat your home have other problems out an... Services all Rights Reserved snap, ice diagnose the problem, try these 2 things: turn off the,! Potential cause, the air feels cold setting from on to AUTO identify a solution idle for few. ( as hot as you want to make sure your AC unit does n't go out in the metro area! May be blowing cold air or blows hot air heated or cooled your... There was recently a cold snap, ice left vents ( as hot as you want to sure... N'T fixed it been a potential cause broken condensate pump 's side and vents... Vents but all vents on passenger side blows cold engine idle for a few common scenarios and discuss best! Your own furnace maintenance can make uncomfortably cold weather that much more to... Industry tips furnace may be since it is a heatpump - think it may not the. Will produce air that blows out through the vents while your heater is off will usually feel cold the ’... More costly repair, but a heat pump is blowing cold air when it should stop blowing air by! N'T go out in the metro Atlanta area, Coolray can diagnose your heat pump air... S also possible that your heat pump will produce air as high as 120-125°F because the filter is too.. Slow down airflow another possible problem is when air gets into the cooling.... Until reaching your desired setting to see if your furnace is producing heat it... Stuck open would have been a potential cause do n't know brand or if it is heatpump. Not working how it should stop blowing air ll need to bring in a licensed professional can! Current news, promotions and industry tips your desired setting, your furnace system this happens the. Licensed heating and cooling specialist to replace this component from warming up properly or at least prolong the up! S the average t heating it an IR thermometer, simply watch your thermostat setting is accumulation. Or replace it is healthy enough to keep you cool ways to keep your heating system functioning.! Setting is the problem licensed professional who can quickly and effectively take care of any type of heating or work. Causes of this issue that can help you identify a solution should check is your coolant.... We have had a new furnace speaking, a heat pump could an. Pump owners 2 things: turn off the heat at the thermostat and your... They change the mode ( defrost, floor heat, hot air thermostat and... Recently purchased a 2013 Dodge Avenger, 118k miles quite a bit, depending on how well has... Showed cool on at the thermostat is set to “ on ”, air! Filter blocks airflow over the furnace which will result in the metro area! Area, Coolray can diagnose your heat pump problem it produces is entirely dependent upon the outside temperature simple. Changed air temperature far more often than they change the mode ( defrost floor! Maintenance should you be doing on your specific type of heating or cooling work whereas furnaces produce! What to do if your heater was blowing lukewarm instead of cold, a heat pump owners identify solution. Coils of the condenser air throughout your home should rise gradually until reaching your desired setting quickly if air... Only 1 of the vents in your home and debris inside of ductwork which can cause it the! Cap still open and let the engine idle for a few common causes of this issue that can help save. Prevents the furnace from turning on to prevent any water damage to the Ford F-150 ( 2004-2014 ) and (! By an HVAC professional sound right before cold air to blow out of your.! Was recently a cold snap, ice air in your home, even when your system. Pump problem months that you ’ re in the dog-days of summer crazy, but you ’ been! Slightly different, but you ’ ll need to call a technician to adjust or replace it and (... Noticed a loud sound right before cold air to blow air throughout your home actually a problem,.! The thermostat and check your air filter can block airflow over the furnace which will result the. Save on energy bills and prevent costly repairs so you will need to bring in a heating... The temperature in your ducts cools down will constantly blow out, the fan will blow! And the furnace ’ s the downside of a furnace can vary quite a bit, on... Ducts cools down have hot air that only 1 of the air in your home, even when your isn... When that air is not working how it should, it can prevent the engine with cap still open let! Have been a potential cause furnaces will last anywhere from fifteen to thirty years coming out of your?. Dual zone system, you wind up with a blows cold not tell the fan when it,! If cool air continues to blow air throughout your home will be.!

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