Even if you have some experience with electrical work around your home, doing your own furnace maintenance is still challenging. Drivers changed air temperature far more often than they change the mode (defrost, floor heat, dash vents, etc. When set to “ON” the fan will stay on even when your heat pump isn’t actually heating. Your Pilot Light Is Out Our professionals are highly trained and are able to work on every make and model of furnace. 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. 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 limit switch is responsible for telling your furnace’s fan when to start and stop blowing air. 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. In addition, routine preventative service calls can also help you save on energy bills and prevent costly repairs. 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 the switch is not working how it should, it may not tell the fan when it should stop blowing air. 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. What to do if your heat pump is blowing cold air. 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. As nuts as it may sound, the air in your home can feel chilly even though the heat pump may be working completely fine. 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. If the line gets blocked, water will back up into the furnace which will result in the overfill kill switch getting tripped. 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. First, find out if your repairs would be 50% or more of the cost of a new furnace. 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? This could make it feel like cool air is coming out of your vents. Heat Pump vs. Air Conditioner and Gas Furnace, Which is Better? In a dual zone system, you wind up with a blows cold one side, hot on other side condition. Just call (770) 421-8400 or schedule your repair online. In such a case, there could be an easy solution, particularly if your thermostat setting is the problem. The thermocouple is a sensor that controls the gas valve and ignition. There are a few reasons your heat pump could be blowing cold air. 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 feel heat coming from the vent near the driver side window. Your furnace may be blowing cold air because the filter is too dirty. 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. 2003 Ford ExplorerAir won't blow through air vents, only in defrostQuick and Simple! We have forced air heat. When a thermostat sticks open, it can prevent the engine from warming up properly, or at least prolong the warming up period. 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 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. (This problem depends in part on the type of thermostat, of course). Once you do that, your fan should only blow out air that is heated by your furnace. If it is set to ON, your fan will constantly blow out air, even when your furnace isn’t heating it. Thanks for watching 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. That causes cold air to blow out of your vents if it is not hooked up properly. You may have noticed a loud sound right before cold air blows out through the vents in your home. Generally speaking, a heat pump will produce air that is about 55 degrees warmer than the outside air. So, what maintenance should you be doing on your furnace? 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. Most furnaces will last anywhere from fifteen to thirty years. 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. So 85-92°F feels cold to new heat pump owners. 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. The temperature in your home should rise gradually until reaching your desired setting. Even with some experience, you can injure yourself or create a larger, more costly repair. So you will feel air blowing through your vents but the air is not heated or cooled by your furnace system. Do you want to make sure your AC unit doesn't go out in the dog-days of summer? Thankfully, there are a few common causes of this issue that can help you identify a solution. When high-efficiency furnaces run, they create water which is then drained through a condensate line. 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. Heat pumps typically produce air that is about 90-100°F, whereas furnaces can produce air as high as 120-125°F. We have had a new hvac company out 4 times but they haven't fixed it. Common blockages include dust, dirt, mold and, if there was recently a cold snap, ice. 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. There are a few reasons your heat pump could be blowing cold 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. Just turn the fan setting from ON to AUTO. 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 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. It is most likely a leaky duct system—but you should have your home’s heating efficiency checked out by an HVAC professional. 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 could make it feel like cool … Let us explain…. As previously mentioned, proper furnace maintenance can make your system last longer. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. Your flame sensor detects whether or not your furnace’s burners are lit. Another possible problem is the accumulation of dirt and debris inside of ductwork which can slow down airflow. © 2020 Coolray Heating & Air Conditioning all rights reserved. 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. Again, this depends on your specific type of thermostat. 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 your furnace fan is set to ON, the fan runs continuously, whether or not your furnace is producing heat. If your heater was blowing lukewarm instead of cold, a thermostat that was stuck open would have been a potential cause. This should bleed off the air bubble. I noticed today that only 1 of the thermostats showed cool ON at the time this is occurring. So, once a heating cycle ends and the furnace burners cut off, the fan continues to blow. Did changing your air filters slip your mind? This unpleasant surprise is common, unfortunately, and can make uncomfortably cold weather that much more difficult to handle. If the coolant level should drop as the thermostat opens, top it up as necessary. And how frequently? I have a 2006 V6. Check to see if your thermostat is set to ON or AUTO. Why a Heat Pump Will Blow Cold Air. Start the engine with cap still open and let the engine idle for a few minutes. Second, look at your electricity bills for the months that you’ve been utilizing your furnace. Contact ABC to have a service specialist come out and make sure your AC unit is healthy enough to keep you cool. 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. Heat pumps usually produce air that is 85-92°F. Flame sensors get dirty more quickly if your air filters are also dirty. Mechanic tried flushing the system with solvent, no luck; also feed a camera inside and doors appeared to be opening and closing properly. Turn off the heat at the thermostat and check your air filter. Faulty thermocouple. To keep your furnace in tip-top condition, replace your air filters once every 30 to 60 days. With the help of ABC’s experts, you won’t have to be worried about being uncomfortable in your home, any time of year. Looking for help to help my mechanic. When set to “on”, the fan on your furnace will blow continually, even when the furnace isn’t actually heating the air. If you’re in the metro Atlanta area, Coolray can diagnose your heat pump problem. If it’s dirty, change it! 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 you just turned on the heat, hot air may not yet be flowing through your air ducts. 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. I have hot air blowing on the driver's side and middle vents but all vents on passenger side blows cold. That creates heat in the coils of the condenser. If you are constantly relighting your pilot light, your system may have other problems. I've recently purchased a 2013 Dodge Avenger, 118k miles. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. When your furnace isn’t running, the air in your ducts cools down. 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. 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 aren’t quite so unlucky and your furnace is only blowing cold air some of the time, you could have another issue. The lifespan of a furnace can vary quite a bit, depending on how well it has been maintained. 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. ), so the temperature actuators generally fail first. Here’s the downside of a heat pump: The warmth of the air it produces is entirely dependent upon the outside temperature. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat … The heat defrosts the coils. When that happens, the HVAC system can be stuck on blows cold air or blows hot air. When this happens, your furnace will continue to blow air throughout your home, even when that air is not heated. Sometimes this happens simply because your batteries have died. Of course, it’s also possible that your heat pump really is blowing cold air when it shouldn’t be. 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. Issue just started, when he turns heat on, blows regularly out left vents (as hot as you want). This is plenty warm to heat your home to your desired 72°F. Gas furnaces produce air that is 130-140°F range. 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. Before we help you diagnose the problem, let’s make sure there is actually a problem. If it’s dirty, change it! If so, this could mean that your furnace is not running at maximum efficiency and it’s time to get a new furnace. A … To solve the problem, try these 2 things: Turn off the heat at the thermostat and check your air filter. If cool air continues to blow out, the first thing you should check is your coolant 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. Have you noticed that your bill has skyrocketed? Clogged air filters could be causing cold air to blow out of your vents. 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). My car has 42000 miles. This switch prevents the furnace from turning on to prevent any water damage to the system. Another common problem is when air gets into the cooling system. 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