heater blowing cold air in house

First – make it worse. If your heater stops blowing after a short period or starts emitting cold air, it might be a good idea to check if the furnace is working fine. To troubleshoot a misbehaving gas furnace, start with the easiest explanations and solutions, then work your way to the most complicated. You might even try turning your circuit breaker off and back on. This cycle must be completed a few times before air from the heater can successfully warm your home. The fan switch is “on” and the thermostat setting is below the actual temperature; The fan is dispersing this air after shutdown; There may be a loose wire coming from the elements; The heater element may be defective Maybe it got shorted out. Electric heaters require power. If your heater turns on but it’s blowing cold air, turn it off and check to make sure there’s nothing obstructing the blower. It may have been closed during the summer for safety reasons. Air also carries humidity, and warm air holds more humidity than cold air. It’s also possible you have it on the wrong setting, such as ‘fan’ as opposed to ‘heat’. The most common type is the furnace or heat pump, which is generally connected to a ducted air system. Check your air filter. Check to make sure that your gas supply line valve is open. So, when the new homeowner called an HVAC specialist (not us, because he was outside our service area – click here and scroll down to see if you’re in it), he learned what was really happening. During the cold winter months the last thing you want to have is furnace problems. Air Conditioning Installation & Replacement, heating repair, installation and replacement, air conditioning repair installation and replacement, Radiator Warning Signs You Shouldn’t Ignore. My heater stopped blowing hot air throughout the house what could it be ? Have an expert inspect your ducts along with the furnace. If the filter looks like the filter to the right in the picture below, replace it. There are other reasons your heat pump could be blowing cold air instead of heat, but those are the basics. If it is set to “ON”, it will continue blowing air even if … The heater’s blowing cold, or the AC is blowing hot. CAUSE: Another common reason for room heater not blowing hot air is broken heater coil. A system error in the controls of the heat pump was forcing an automatic system shutdown just seconds after it started. Electric Furnace. Thank you very much in advance. These 5 fixes can solve most furnace problems without you needing to pay for a repairman to come out. That way, your blower won’t run 24/7 and thus send cold air through the vents if the room … If energy efficiency is as important to you as heating or cooling your house, making sure you have a clean air filter is a critical troubleshooting and maintenance step. Heating systems work by heat exchange, which means that your HVAC system returns the cold air to the outside of your house. When your furnace isn’t running, the air in your ducts cools down. So what causes the furnace to overheat? The thermostat’s fan is set to ON. 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. The result is a heater blowing cold air. (This problem depends in part on the type of thermostat, of course). Meanwhile, you’ll get cold air because the fan continues to run as a safety measure, even after the furnace isn’t producing heat. Because it illustrates just one of many reasons why a heater might blow cold air, and an air conditioner might blow hot air. Motors that turn the fans and make the conversion process from warm to cold (or cold to warm) work right can get old and rusty, or break down for other reasons. Make sure the thermostat is set to “AUTO”, not “ON”. The house stays at a constant 72 degrees (what it's set at), but I'm afraid that the unit may be in need of repair or replacement, or that it might be using more energy than necessary. This was part of the problem our friend was dealing with. However, fixing the problem can be easier than you think. Because it illustrates just one of many reasons why a heater might blow cold air, and an air conditioner might blow hot air. Heat Pump Blowing Cold Air | Refrigeration Heating Troubleshooting. This entry was posted Since the heater core is often the high point in a cooling system, air can move into it … Why is the heater blowing cold air from the vents - YouTube There are many reasons an HVAC (heating, ventilation, air conditioning) system might stop working. If that happens, your heater (or AC) will not produce the temperature of air you want it to. And, it increased their heating costs a ton, because the air handler is a far more expensive way to heat a house than the much more efficient heat pump. Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. Why Is My Furnace Blowing Cold Air Sometimes? If your heater was blowing lukewarm instead of cold, a thermostat that was stuck open would have been a potential cause. You can hear it blowing, but no heat is coming out. The Pilot Light Has Gone Out. The wires together work as a complete circuit and in case any of them snaps from the constant heating and then cooling then the circuit may get broken and may stop giving off heat. In older models, verify that the pilot light is lit. Another possible problem is the accumulation of dirt and debris inside of ductwork which can slow down airflow. If my closet door is open, it feels like a freezer door is open an there's a fan blowing cold air … If your forced-air gas furnace is blowing cold air, a number of factors could be to blame—many of which you can address on your own, without the immediate help of a service professional. Check the air filter. A friend of ours bought a new house recently. Solution: Change the air filter and see if your furnace starts only blowing warm air. I've never seen such a thing. Both comments and pings are currently closed. This field is for validation purposes and should be left unchanged. So if you feel the air blowing out of the vents while the furnace is off, the air … A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. Solution Based Plumbing & Heating. Your heater has to first collect and compress the air in your home, then heat it and expel the cold air. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. 7 Reasons Your Heater Blows Cold Air/AC Blows Hot Air. Tags: AC, AC maintenance, AC repair, air conditioner maintenance, air conditioner repair, air conditioners, energy efficiency, furnace maintenance, HVAC, HVAC maintenance, HVAC repair, thermostat. Third – hire a professional. Another common problem is when air gets into the cooling system. This rendered the AC useless. If you clear any debris or blockage and the problem persists, you could have a faulty heating element. Check the thermostat. The Heater is Too Big/Small – The heater’s size makes a difference to how well it works. It could be that your heater is working just fine. What to do: 1. When he had a professional look into why this was happening, he learned it would be an expensive repair job on an outdated heat pump. 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 result will be that your heater is blowing cold air. Why tell this story? … Changing the air filter can possibly fix the cold air problem, but only if that’s the only problem that is keeping the heat from blowing hot air as opposed to cold air. That’s what our friend’s former homeowners appear to have done. Sometimes this happens simply because your batteries have died. But, when it's running - just occasionally, and I guess it's when it's heating the water - it creates freezing cold air. SOLUTION: Check if there are any breaks in the line after opening up the case. If it’s dirty, change it! Your furnace may be blowing cold air because the filter is too dirty. If you turn it up and the air blowing through you house is still cold, then this isn’t the cause of the problem. An electric heater that blows cold air could be caused by one or more of the following reasons: The manual reset has tripped. Especially if your furnace is blowing cold air. When he turned on the air conditioner, warm air came out. Again, this depends on your specific type of thermostat. If your ducts have cracks or worse, then the cold air blowing into your house might be coming straight from outside right into your ducts, mixed in with the warm air your perfectly functional furnace is producing. Do I Really Need to Clean My Gas Fireplace. 6. Changed the air filter Changed the thermometer to the ecobee 3 (old one was a honeywell started malfunctioning) Would calling a pro be pricey? 1) Change the furnace’s air filter if it’s dirty His heat pump was starting up and then shutting off immediately, and the emergency heat was taking over. But the heat pump was also just very old, and repairing it would have cost nearly the same as just getting a new one, which is what they ended up doing. To protect the heater from malfunctioning altogether, engineers embed automatic limit switches that are responsible for turning the heat-generating furnace off. There are many reasons an HVAC (heating, ventilation, air conditioning) system might stop working. When overheating, your furnace can trip a high limit switch , causing the furnace burners to shut off so that the heat exchanger does not crack. When set to “ON” the fan … The Fan Is Off . If you hear that irritating screeching sound when your system turns on, this could be the reason (though it’s not the only reason that happens). If so, your heat pump is blowing warm air that just feels cold to you. The last five items on the list above require a professional or a new furnace or heat pump to fix them. When set to “on”, the fan on your furnace will blow continually, even when the furnace isn’t actually heating the air. In extreme cases, low humidity can even crack wooden furniture. When his inspector looked at his HVAC system (a heat pump, meaning it both heats and cools the house), a few big problems immediately made themselves known. All Rights Reserved. So if your furnace shuts down or stops blowing cold air, you’re in a chilly situation. Your System Was Just Turned On. But all you have to work with are the symptoms. on Thursday, November 8th, 2018 at 12:26 am and is filed under AC service, Home heat service, maintenance. These simple fixes might solve the problem, saving you lots of trouble, frustration, and expense. If your heater is blowing cold air, and it’s not one of the first two possible explanations on this list, then you’ll need a specialist to at least come and take a look. If you only feel your furnace blowing cold air briefly, and the air is quickly replaced by warm air, this is … When he turned on the heater, the outdoor unit didn’t seem to be working right, but the indoor unit, an air handler, came on and seemed to heat the house. You might be able to tell if your ducts have a leak, but fixing them is another issue. Heat Pump – If a heat pump is blowing cold air, its auxiliary heat strips might be malfunctioning or the level of refrigerant might be too low. Hence the hot air. There are a few reasons your heat pump could be blowing cold air. When a heating cycle begins and your air handler turns on, that cool air will blow out of your registers before warm air does. Situation #1: When the heater blows warm air for a while and then blows cold air. There are two different system types: forced air duct systems that push warm air with the aid of a blower into the system and vents, and gravity furnace systems that use convection currents to circulate the warm air. There could be two possible causes for this: The thermostat fan is set to “ON” The fan in the furnace is responsible for blowing heated air through the vents. To solve the problem, try these 2 things: Turn off the heat at the thermostat and check your air filter. Likewise for the air conditioner. Well this happens sometimes and a few things can be the cause. The dirty air filter will block airflow, causing the furnace to run longer to heat your home until it overheats. In reverse turns on but it’s blowing cold air because the filter looks like the filter too! On the type of thermostat, of course ) that the pilot light is.... Outside of your house heating system is only blowing warm air for while. Your specific type of thermostat heater that blows cold air has gone out off immediately and! Please contact us to find out Stevens, Marysville, Renton could be by. Ends your furnace shuts heater blowing cold air in house or stops blowing cold air that it is to. Controls of the heat seemed pretty weak switches that are responsible for turning heat-generating... 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