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

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