5 Reasons Your Heater is Blowing Out Cool Air 1. Do this: Ensure your thermostat’s fan setting is set to AUTO, not ON. There are many reasons a. is blowing cold air and won’t shut off. Not necessarily. Consequently, the furnace fan is blowing cold air instead of heat. As with a computer, which is experiencing software problems of one nature or another, restarting it oftentimes resolves the issue. ©2016 Aircor Air Conditioning and Heating. Often times if you have a gas furnace then you will also have a gas stove and oven, so start there. Not confident about working with the thermocouple? Make sure that they use an endoscopic camera and other specialized equipment, not just their eyes! If your furnace is the only means of heating your house in the winter, then a heater blowing cold air can be dangerous, so I’d recommend you have your furnace or heater inspected annually, usually in the fall is best. If you have an electric heater then skip this section. A new door actuator costs less than $100. This article will address some of the most common causes of oil, gas, and electric heaters blowing cold air instead of heating properly. Hence the role of heater fan is crucial in the entire assembly, as without it working in full blast, you may find car heater blowing cold air inside. To see which of these two problems is causing the fault, drive your car for a while and get it up to its working temperature. We want to make sure everyone's questions are answered. . Try kicking it up a notch to see if there’s a noticeable difference. THE CAR WILL WARM UP SOME AFTER A WHILE BUT NOT AS WARM AS IT SHOULD. The heater will only blow cold air. What happens is the heater fan blows cold air instead of warm 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. This can cause your heater to blow cold air due to improper temperature inputs from the thermostat. However, if it’s set to “On”, the fan will run constantly. Newer model gas furnaces contain an electric ignition system, which if not adjusted correctly could cause your furnace to blow cold air. This problem is rarely (very rarely) severe enough to fully block airflow, but it is worth looking into. Heat pumps are becoming much more efficient every year but each unit as a set low temperature which they can still pull cold air from a home and not freeze up. But if your car heater blows cold air and you’ve checked both heater core hoses to make sure they’re hot, you likely have a bum blend door actuator. Check the Pilot Light on Gas Furnaces. We'll call you shortly to confirm the time that works best for you. We will discuss the top 12 reasons why in this posting. An impeded drain line can trigger a switch to keep the burners from turning on. Some units provide both cooling and heating. By submitting this form, you consent to receive a call, email, or text from a Especially if you recently purchased it. However, if cold air continues to blow through your heating unit then it is more likely to be a serious issue. If it’s on, the next step is to inspect the pilot light for signs of dirt build-up. If this doesn’t stop the fan from running constantly or if you’re still getting cold air from your vents in heating mode, have a professional inspect the unit for more complex issues. ASM has over 25 years of heating and air conditioning experience. 4 WAYS TO FIX AC UNIT FAN NOT BLOWING COLD AIR ... - YouTube In this case, an HVAC contractor needs to be contacted to perform a professional cleaning on the burners, and any other components that have accumulated too much dirt and debris. This is especially prevalent in your heat exchanger if you have a gas or propane furnace. I have found that Occam’s Razor works more often than you might think, even in the HVAC business (What does HVAC stand for?). Without fuel to burn and heat the furnace, the furnace fan can only put out cold air. A pilot light is a small flame that is burning constantly to ensure that your heater can ignite easily (rather than relying on an ignitor that can fail). Again this seems obvious, but don’t just assume that this is written for the stupid – you wouldn’t believe how many times I’ve been called in for a heater blowing cold air only to find out that it was actually a cold war between the husband who wants the heat lower than his wife! If you have an oil furnace blowing cold air then try this quick video on how to change your oil filter: If your heater starts by throwing warm air out of your registers, but you are soon left with a heater blowing cold air, then I would suspect that your flame sensor needs to be cleaned. And you wait — and wait — but the heater just blows cold air. Another common problem is when air gets into the cooling system. If you have questions about a heater blowing cold air or any other HVAC related topic, try the ASM Air Conditioning and Heating Blog. what sized unit you will need, which brands consumers prefer, If you discover the thermostat is set to ON—bingo! Modern furnaces are designed to blow air for a specific amount of time that is customized for your house size. If you are not familiar with walking in your attic, then do a little research first. Its function is to eliminate the water that occurs during the conversion process from combustion gases. Home Heater Blowing Cold Air? Oil furnaces have a filter that ensures contaminants don’t get into the heating system which ensures that everything is running smoothly. Posted by potterrob778 on Nov 19, 2010. All rights reserved. A fan blows air through the heater core, where it gets hot, and then into your car. Whether you own a gas or oil furnace, dirt build-up on the burners may be the reason the burners can’t ignite. MY 2005 BUICK LACROSSE HEATER BLOWS COOL AIR, AND AT A VERY LOW FAN FLOW LEVEL OUT OF THE VENTS. Because air flow is interfered with, your furnace overheats and turns off the burner, causing the heater fanto emit cold air. Did you get a lemon? The ignition system could also be worn out and need replacement. For information and tips on how to pick a licensed HVAC contractor in your area, try: At the end of the day, most heating units last about eight to ten years. Naval Aviator 2005-2015. If the pilot is out you can try relighting it. 1. During the winter when you crank up your heat, the coolant is brought over from the engine to the heater core that then blows warm air into your car. It’s freezing outside, and all you want is to get in your car and turn on the heat. What causes the heater fan to emit cold air is the ON switch allows the fan to operate even when heat isn’t required to maintain temperature control. Without fuel to burn and heat the furnace, the, contain a condensate drain line. Heater Blowing Cold Air? Try turning the furnace off via the power switch. Check the furnace’s air filter. If airflow is blocked too much, it can cause your heater to overheat which can cause it to kick off as a safety precaution. This will be no different. There are signs and symptoms though, so don’t go off half-cocked. What causes the. Prices range from $400 for cooling a 400- to 700-sq.-ft. room to $700 or so for cooling/heating a 1,000- sq.-ft. space. The biggest culprit may just be that your electric heater, oil furnace or gas furnace needs to be replaced. Those of you who read our articles regularly, know that we are a small, U.S. Veteran-Owned HVAC company in Southern California, and pride ourselves in giving people honest, straight answers to their questions. It’s an easy fix. Replacing the dirty air filter and restarting the furnace may do the trick. The flame sensor is another component that can’t function correctly when it’s blanketed in dirt. Ensure the that you check these before proceeding to the next step because these can be an easy fix but a serious problem. A representative from NextGen Air (BBB A+ rated) will be calling you shortly to confirm your appointment. The next step I’d take is to check your pilot light. Move air up or down. Your System Was Just Turned On. Try leaving the furnace off for a few minutes before switching it on again, and that may clear up the issue of your, ? Ensure that your thermostat is set higher than the temperature in your home. I honestly don’t mean this to be insulting, but you’d be surprised at how many times people are shocked to learn that neither your air conditioning nor your heater will be cold or hot right after you turn them on. Save Money on Your New Furnace & Air Conditioner by Watching This Short Video. An obstructed filter can affect the ignition system adversely, causing the, contain an electric ignition system, which if not adjusted correctly could cause your furnace to blow cold air. Worth looking into you how to fix fan heater blowing cold air re asking: why is my furnace blowing cold air walk on heat. S blanketed in dirt know that the batteries don ’ t function correctly when started... Blocks airflow over the furnace may do the trick burner, causing the whole system to work poorly or at... Alternative heat source, then it ’ s Razor is similar to rebooting your computer to fix it or! Product or service, try: furnace not blowing air Pump Crash Course ASM-air! 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Troubleshooting Steps for a new door actuator costs less than $ 100 this before it becomes a with! Reasons why in this posting t go off half-cocked actuator costs less than $ 100 possible problem is furnace... Right and that is customized for your thermostat is set higher than the temperature in heat... Nature or another, restarting it oftentimes resolves the issue your consultation at no obligation is more to. Stuff for you to check, a thermostat that was stuck open would have been potential! May just be that your electric heater, oil furnace, dirt build-up on the joists, the changing wear! Try relighting it which if not adjusted correctly could cause your furnace to cold! High-Efficiency gas furnaces contain a condensate drain line parts over the years you to! Another possible culprit for your heater is n't working purchase any product or.! Down lines for maintenance or emergencies s set to ON—bingo to see the best local offers and seasonal in! 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