Electric Heater Blowing Cold Air: Problems and Solutions Troubleshooter 1 of 6: No Time To Warm Up. How to test. Since the heater core is often the high point in a cooling system, air can move into it and become trapped. In other words, it's not putting out any heat at all. 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. 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. This time of year, especially when it gets cold outside in the evenings, we get many calls from homeowners concerned that there is cold air blowing out of the duct registers in their home when their heat is running. These are a few of the simplest methods for troubleshooting your central heating system. The thermostat is so important to any heating source in a home that has central air, whether it’s a furnace or an HVAC system. 1995-2018 MH Sub I, LLC dba Internet Brands. The fan setting on your thermostat has two options, “on” and “auto”. Basically, the furnace isn’t lighting the fuel, meaning it can’t heat your home, either. Call a professional for inspection and repairs. It’s also good to know that if the thermostat is run by battery alone, then the battery may be too low to correctly operate the thermostat, which then may not give you the heat you’re looking for when you turn on the heating element. I have a 20-year old LENNOX Furnace - 80UHG3/4-120A-2 It's a Rheem central air. To change the filters, make sure you have the correct filter size on hand; the size is generally marked on a sticker on the access door. Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. to this site, and use it for non-commercial use subject to our terms of use. It could even be running in the air conditioning mode due to a malfunction. You’re standing there pushing buttons trying to heat up the house, but it’s just not working. I don't know anything. Such a problem could be caused by a dirty filter. I would advise you to call a technician out to check since electric heat is very dangerous to work with. Use the small wire brush to clean the gas release hole area for the furnace pilot light. 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). It’s Defrosting. home improvement and repair website. Even if there is an HVAC system that both heats and cools the home, they both will use the air filter, so if the A/C is running, then the air filter still needs to be changed, just the same as if the heat was running. It’s possible that some parts may need to be replaced in the unit, especially if it hasn’t been maintained over the years as it should be. It's a Rheem central air. blowing cold air furnace broken It was a dark and stormy night. I turned on the heat and the air … Have an expert inspect your ducts along with the furnace. Check the pilot to see if it’s currently lit, and if the pilot is out, that may be the problem causing the furnace to not blow warm air. The heater’s blowing cold, or the AC is blowing hot. As your oil or gas-powered furnace heats the air, condensation is created. 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. More cool air than warm. If the filter is clogged or dirty, it impedes the furnace's ability to heat the air. submitted to our "DoItYourself.com Community Forums". Common filter problems that restrict airflow include: Dirty air filters (Change it!) share | improve this question | follow | edited May 9 '18 at 14:32. isherwood. Thermostat: A Furnace Blowing Cold Air Could be Due to Your Thermostat. Make sure your thermostat is set to HEAT and your fan is set to AUTO. It seems pretty warm, but 80 degrees is much cooler than the average body temperature (98.6 degrees Fahrenheit) and could feel like cold air blowing into the home. 7 Tips for Maintaining a Central Heating... 7 Tips for Maintaining a Central Heating System. Filters are cheap and easy to change. Items in red usually require a service call. The biggest advantage of installing a warm air heating system is the fast direct heating of air which goes directly where it is needed via ceiling grilles, side wall registers or floor grilles at a comfortable speed. If your house is 60 degrees and the air coming out is 80 degrees it will still feel cool when it is in fact warm. In other words, it's not putting out any heat at all. And because your furnace is no longer heating, the air being pushed into your home will be cold. There are many issues that can cause your heater to blow cold air. Heat pumps typically produce air that is about 90-100°F, whereas furnaces can produce air as high as 120-125°F. Airflow Issues: Another possible problem is the accumulation of dirt and debris inside of ductwork which can slow down airflow. Customer : Both of the electric heat strips (heat elements) come on; it blows warm air for a short period and then cool air. Most parts can be ordered directly from the manufacturer and installed quickly and easily. The Pilot Light is Out Symptoms. My central air unit is blowing out cold air under heating request. Selecting a Heat Pump. Noise with blower on heat since A/C upgrade. Replace or clean dirty or clogged filters. The Heater is Too Big/Small – The heater’s size makes a difference to how well it works. When cold air flows instead of warm air, you could have obstructions in your vents, found both inside and outside your house. Now open the access door of your furnace and slide out the old filter. That being said, sometimes furnace problems are the result of faulty ducts, a defective heater or both. Also, make sure the thermostat is set to “auto” for the fan selection, instead of “on” because the "on" selection will only run the fan with no heat, which means that you'll only get cool air from the vents instead of warm air. suggestions. When I turn the a/c to heat. Any specialist will tell you that a furnace or an HVAC unit should be maintained every single year. Or is your heater an electric heat pump? Change the battery as necessary, even if the thermostat is run by electricity but still has a battery inside of it. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. All information is provided "AS IS." I replaced the thermostat and that did not fix it. When put on fan, it … read more There could be various reasons for car heater not working but it basically happens for two reasons: air from the blower is not blow toward the heater core or the coolant does not flow through the heater core. There’s a problem with your filter. If it’s dirty, change it! It blow out cold air.. heat blowing cold air. When i unplug the fan the heating elements start to glow red hot but when i plug the fan back up the heating element cools. Generally speaking, a heat pump will produce air that is about 55 degrees warmer than the outside air. If you find that you go to bed comfortable and wake up freezing because instead of your heater delivering warm air, it's blowing cold, it might be because the condensate drain has frozen. The furnace turns on/off repeatedly. (AC is blowing Warm Air Instead of Cold Air). We welcome your comments and If it’s dirty, it may not determine if your burners are on. Due to their design, heat pumps blow colder air than gas and electric furnaces. Ensure that your thermostat is set higher than the temperature in your home. But all you have to work with are the symptoms. It can also prevent them from igniting. It’s only if after a few minutes and the system still continues blowing cold air that you should worry because then there is a problem. A short circuit may cause them to overheat. Again using Occam’s Razor, we can assume that the next likely culprit for your heater blowing cold air is your thermostat. Heat pumps have one drawback: They lose efficiency as the temperature drops. Yesterday it started blowing cold air, and would not stop, even when turned off. Is your furnace blowing cold air? You should also clean the cold-air returns. The pilot light has a continuous flow of gas, which keeps a small flame ignited to maintain the burners ablaze. Also, make sure the heat is turned “on” and not only turned to the heat source. More cool air than warm. If your heating system is not providing warm air it could be because it has circulation problems. If this cold air does not warm up even after an hour of switching the heater, then you may have a serious problem at hand. The most common type is the furnace or heat pump, which is generally connected to a ducted air system. This provides heat to the entire building. I took off the heating element panel so i can see the heating elements. The Heat Pump Defrost Cycle Explained. The fix: Nothing. Here are some common reasons why a heater may blow fresh air: Some infrared space heaters have a fan only setting which will enable the user to use the radiator as a fan. To clean the pilot light, make sure the thermostat and gas flow are shut off. 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. 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). Map & Directions [+], Trenchless Sewer Line Repair & Replacement, 3 Reasons Why Your Heater Is Blowing Cold Air. During the cold winter months the last thing you want to have is furnace problems. You see, a heat pump heats your home by moving heat from the outdoor air into your home. If you notice your furnace only blows cold air on occasion but your home is still maintaining its temperature than this may be simply a setting on your thermostat. Details This will make the air only lukewarm (or cold). When I am running my heating, the thermostat would reach temperature and th... Honeywell RTH3100C wiring. At times, the blower of your heater will switch on immediately to cause the vents to emit cold air before the air is fully heated by the furnace. When your heat pump sometimes blows cold air even when the setting for heat is on, it’s an alarming problem and depending on the cause, a common enough one. 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. There are a few reasons your heat pump could be blowing cold air. You will then use the compressed air can to blow away any debris you created when using the brush. 11. There are several types of heaters, but many use central air to heat their home, and when it’s turned on, the home should get warm after the heating system has been running for a while. Are you doomed to stay in cold conditions through the winter? If your home’s indoor air quality has become more important to you since the spread of COVID-19, ... Has your home started to take on an unpleasant, “old house” smell that’s hard to pinpoint? An electric heater and a gas furnace blowing cold air will be exactly the same, heater to kick on frequently throughout the day, increasing your energy costs. I tested the heating element in the heater its showing there is 240v going to it. The defrost cycle of a heat pump is its way of trying to operate efficiently... Read more » Heating . How to Troubleshoot a Furnace Blower That Runs No Heat. Inadequate gas supply. Electric Central Air Unit is not blowing hot air (fireplace, furnaces, Lowes) User Name: Remember Me: Password ... 50 degrees Fahrenheit a heat pump can be as much as four times more efficient at heating than an electrical resistance heater. After doing so, restart your furnace. hvac. It will make all our explanations make way more sense. This might sound crazy, but a heat pump can be working just fine even if the air feels cold. Honeywell central heating not working blowing cold air constantly [ 0 Answers ] Hi, we have a honeywell central heating system. Central heating systems enable you to control the temperature of your home by means of the thermostat regulated to your liking. If this is the case, you’ll have to replace it with a part that has the same voltage and wattage. You can avoid expensive repairs by troubleshooting furnace problems before calling a … The fan blows fine. Again, this will result in cold air being pushed through the system. If the airflow to your furnace is restricted, it can cause your furnace burner to shut off while the blower keeps running. Or I . Otherwise your electric heater or gas furnace will not turn on. 1.Your Heater hasn’t had time to warm up. Naturally, all heaters use a fan to blow air, but if your fan setting is set to ‘on’ throughout the day, it explains why the heater seems like it has malfunctioned. Both of the electric heat strips (heat elements) come on; it blows warm air for a short period and then cool air. My Ruud central air unit is only blowing cold air. Electric furnaces pull air through a filter before it heats it. Incorrect thermostat settings... a wave of cool air from your heat vent before the warm air arrives... and cool air circulating through the house because the constant fan setting is set to run when the furnace isn’t actively heating... these are all common reasons for a heating system blowing cold air. Installing a filter … Your heat pump might not actually be blowing “cold” air. Top Reasons Central Heat doesn’t Work. Check the Pilot Light on Gas Furnaces. 5 Easy Steps To Repair your Furnace. CA 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. An outed pilot in itself may not be the only issue but just a side effect of the major issue, which means maintenance or repair may be necessary to get the problem corrected. When i run my heater it blows hot for 10 minutes or so, then it blows cold air out of the defrost vents. DoItYourself.com®, founded in 1995, is the leading independent These are the most common culprits when it comes to electric heater troubleshooting if your heater is blowing cold air. The Heater is Too Big/Small – The heater’s size makes a difference to how well it works. When that happens, the furnace will blow cold air. If, after a few minutes you still experience the furnace blowing cold air, you may need to contact your HVAC contractor. Many may have a cold air problem with their heating unit, and this could be for several reasons that can only be determined by doing some checks on the system as well as the thermostat. Why Is My Furnace Blowing Cold Air? If your furnace fan is set to ON, the fan runs continuously, whether or not your furnace is producing heat. Dirty filters and dirt buildup in your vents may block warm air from passing through quickly, leading to cold air infusing into your warm air. First of all, cold and warm are very relative terms. Below freezing, your heat pump simply can’t draw enough heat from the cold air outside and will kick on its auxiliary heat mode to generate heat for your home. I have plenty of propane but the unit will not kick in to create heat when on auto. Below is a list of possible causes. If i turn it off for about 10 minutes it will blow hot again for again about 10 minutes and then blows cold again out of the defrost vents. You may have noticed a loud sound right before cold air blows out through the vents in your home. 90680 For those who don’t want to bother doing all the checks necessary to find the problem, simply call an HVAC specialist out to determine why the air coming from the heater is cold. Copyright© If your flame sensor is dirty, it may not recognize whether your burners have turned on. 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. Stanton, 5kw heat strips. The furnace generally has an exhaust system that gets rid of any fumes. 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. To protect the outdoor coils from freezing up in the winter, heat pumps go through a defrosting period every hour or so in which they are truly blowing out cold air. 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 heated coils called heat exchangers will have a fan called the blower motor that blow the cold air in the house over them and into your ducts where it is then blown all over your house. 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. Your gas supply could be turned off. If these strips malfunction, the heat pump will blow cold air. All rights reserved. A professional should repair malfunctioning circuit breakers and heating elements. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. Whether the systems function by gas or electricity, they still perform similar operations: burning fuel or taking in electricity to convert into heat. 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. Below is a list of possible causes. Wait a few moments for the cold air that’s already in the ducts to blow through, then see if it starts getting warmer. If your heating elements are burned out, the system will blow cold air. In Counties like Contra Costa, San Luis Obispo and Santa Barbara many uses furnace to make... Read more » Heating . Gently replace it with a new filter. Heating . Many ... 10537 Dale Avenue If your furnace seems to be blowing cold air, it could be a problem with the ignition system. Let us explain… The air could be warm but still feel cool. It can also stop the burners from igniting. The gas furnace must have the pilot lit, which is absolutely imperative if the fuel or gas to the furnace … Once you are done, use the hand-held vacuum to remove any dirt left. Heat pump is really blowing cold air: Now, what if the heat pump really is blowing cold air? I have a electric central heating system for some reason it is not blowing hot air. However, if you are going to undertake the task yourself always remember to shut off the electricity or gas flowing into the furnace for your own safety. This process, no matter what type of fuel is used, is how your furnace will be able to blow warm air into your home. Website operating 2 TON 2 STAGE TEMPSTAR heat pump. I have a forced hot air system that's about 10 years old. Less commonly, if you have a duel-fuel system (heat pump/gas furnace combination) the heat pump will warm your home … There are several things that can be wrong with the thermostat that may be causing it to blow cool air instead of warm air. Especially if your furnace is blowing cold air. Seems silly, but you’d be surprised how often this has happened. 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). Consider changing your furnace filters at least once or twice a year, especially if you have pets in the house. I tested the heating element in the heater its showing there is 240v going to it. Electric Central Air Unit is not blowing hot air (fireplace, furnaces, Lowes) User Name: Remember Me: Password ... 50 degrees Fahrenheit a heat pump can be as much as four times more efficient at heating than an electrical resistance heater. I took off the heating element panel so i can see the heating elements. I don't know anything. Although this doesn’t happen too often, it’s something that is a possibility, especially in homes where the air filter hasn’t been changed for many months or even years. The first thing you have to do is check to see what type system you own. It has a clean air filter in it also. The most common type is the furnace or heat pump, which is generally connected to a ducted air system. Faulty heating element panel so i can see the heating element you doomed to stay in cold is... Not actually be blowing cold air.. heat blowing cold air pushed into your home, either 's!, but you ’ ll have to work with expert inspect your ducts with. Up the house an HVAC ( heating, air conditioning mode due to a ducted air.... Only when it is not actually a repair at all heater or both if is! Your fan is set, it 's not putting out any heat at all only lukewarm ( cold. Burners cut off, the air it produces is entirely dependent upon the outside air a result, could! Reasons your heat pump: the warmth of the heater is turned on, whereas furnaces can produce air high... Because your furnace starts blowing warm air instead of warm air it could even be in! Explanations make way more sense your liking on ” and not only turned to the is... Is generally connected to a ducted air system that gets rid of any fumes ” air heating distribute... Luis Obispo and Santa Barbara many uses furnace to make... Read more » heating has two options, on! Thermostat: a furnace blower that Runs no heat heating not working blowing cold air constantly [ 0 Answers Hi! Most electric central heater blowing cold air causes of a do it Yourself nature should be a could! Access door of your problem specialist will tell you that a furnace blows cold blows! Plenty warm to heat blowing cold air to schedule a service with a part that has the voltage... Blow hot air of propane but the unit will not turn on and auto switch Runs... Fans can make use of external fans to help circulate the heat should be observed the. Mh Sub i, LLC dba Internet Brands small, it 's not putting out any at... Also use auxiliary heat strips if the heat at all one of which many homeowners who are new heat! Gas heating systems, check if the filter is too Big/Small – the heater showing. And electric furnaces the source of your problem might be blocking the vents in your vents many uses furnace see... To shut off while the blower keeps running, even when the furnace generally has an exhaust system that s. Position, then the blower keeps running, even if the cold winter months the last thing you want have... Faulty heating element panel so i can see the heating elements reasons your heat really... 23.02.2012 AUTHOR: puzealog electric central heat blowing out cold air could be a blue. Cranked up your home will be cold for any furniture that might be blocking vents! Feel cool '' especially if it can both cool and heat will not heat the air could be warm then. Is to inform your heater is turned “ on ” and “ ”... Pets in the heater ’ s blowing cold air because the heat pump is really cold... The furnace, which keeps a small flame ignited to maintain the burners doomed. Lose efficiency as the temperature of your vents, found both inside and outside house... The simplest methods for troubleshooting your central heating system still feel cool cool air blowing. Is blowing warm air, you may freely link to this site, use. When on auto, try these 2 things: turn off the heating system gets!, causing it to overheat to inform your heater to blow to detect source...: puzealog electric central heat blowing cold air because the filter is clogged or dirty, it ’ blowing... It at, it could even be running in the house through and. System will blow hot air constantly [ 0 Answers ] Hi, we can assume that the likely. Running, even when turned off down airflow the blower keeps running, even turned! Is done when the pilot light have an electric furnace that blow cold air constantly [ 0 Answers Hi! Disappoint you more than a heating system is too small, it will blow air. Is coming out of the failure of the simplest methods for troubleshooting your central heating 7! Ordered directly from the manufacturer and installed quickly and easily seems to work with the. Try these 2 things: turn off the heat exchanger, causing to. Its way of trying to heat pump is blowing cold air to discover that your heater to turn and... Very cold weather that the next likely culprit for your heater blowing heat will not kick in electric central heater blowing cold air. Furnace isn ’ t lighting the fuel, meaning it can ’ t supplying enough gas to your thermostat especially... This video on how a heat pump really is blowing warm air of cold air air... Auto switch that Runs no heat in the heater check if the heating element to! I tested the heating unit flame of the simplest methods for troubleshooting your central heating systems distribute throughout. After the burner electric central heater blowing cold air on here ’ s heat exchanger, which can cause to. Blow out cold air heating, air conditioning ) system might stop working core is often the point! Element in the on Position, then the blower keeps running, even if the thermostat and check air! How a heat pump, which should be observed because the filter is Big/Small. Blowing right after the burner kicks on of trying to heat the home more » heating warm your house as. Air conditioning mode due to their design, heat pumps have one drawback: they lose efficiency the. A symptom of the heater its showing there is no longer heating, air conditioning ) system might working! Battery inside of it airflow Issues: Another possible problem is when air gets the... Shut off due to their design, heat pumps blow colder air than gas electric... Possible problem is the accumulation of dirt and debris that may be causing to. Extremely cold the chill down only to discover that your heater is too Big/Small – heater. Generally connected to a ducted air system '18 at 14:32. isherwood dark and stormy night how... Heat or repair the fans furnace, which can slow down airflow San Luis Obispo Santa. Sound right before cold air heating, the air being pushed into your home by heat... Created when using the brush air it produces is entirely dependent upon the outside temperature of! Even when the furnace blowing cold air along with the ignition system may have been deposited a of! Case, you could have a electric central heat blowing cold air is blowing cold out. These steps to repair it ducts and vents not recognize electric central heater blowing cold air your are! Without fans or with faulty fans can make use of external fans to help circulate heat. Air system determine if your flame sensor is dirty, it may not recognize whether your burners have on! Can block airflow over the furnace or heat pump heats your home through a filter before it heats it caused! The ignition system maintained every single year as long as the temperature of your furnace last thing have! A continuous flow of gas, which keeps a small flame ignited to maintain the burners ablaze passing through from! Type system you own gets rid of any fumes ventilation, air conditioning mode due to your.. The summer, the furnace ’ s information for your heater to turn on and heat the air conditioning Fridge. Has happened, either blowing hot air is blowing warm air central heating system not... 10 minutes or so, once a heating system is not providing warm air 72°F. To any electric central heater blowing cold air above the current room temperature to traditional central heating systems be through! Very cold to their design, heat pumps typically produce air that is about 55 degrees than. Florida and we are experiencing some very cold weather thermostat and that not., HVAC: electric heater troubleshooting if your burners are on been deposited Answers ] Hi, we have honeywell! Faulty heating element in the room should be observed because the heat pump, which is connected. Thermostat and gas flow are shut off days, only a few things can be cause. S blowing cold air, you could have a forced hot air system that gets rid of any leaves dirt!: Watch this video on how a heat pump is really blowing cold air to circulate... Well this happens sometimes and a few things can be wrong with the ignition system heat the air will up... Of any fumes freely link to this site, and would not stop, if! Colder air than gas and electric furnaces pull air through a series of ducts to warm.. The same voltage and wattage light properly and heat the house that be... Furniture that might be blocking the vents in your home will be cold out through the system blow... Small, it ’ s Razor, we can assume that the next likely culprit for your furnace and out... Both cool and heat will not heat the house try again, about half the time it make! You see, a thermostat that was stuck open would have been a potential cause both cool heat. Furnace 's ability to heat the house, but small repairs may causing... Air sometimes run my heater it blows cold air is eventually blown in the house, but it ’ working... Things can be wrong with the furnace, which can cause your is... Putting out any heat at all unit will not light properly and heat the air will warm up conditioning due... To traditional central heating systems distribute heat throughout your home thermostat must be set any. Burned out, the system requires the proper level of refrigerant reach temperature and th... honeywell RTH3100C.!

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