The fan setting on your thermostat has two options, “on” and “auto”. On home units once they start failing they need to be replaced. Sometimes ducts may leak, causing air from colder places, like your basement or attic, to get into your vents. The more contaminants that are floating through the air, the more your filter will have to clean. If your furnace starts to overheat, your furnace may cause the limiter switch to go off. If your thermostat is set to "on" instead of "auto," it could be causing your furnace to blow cold air. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. Having to get repairs done to your ducting is a pain, but if cold air is coming into the ducts through holes or other leaks then the air can be cooler than you would like. blowing cold air furnace broken It was a dark and stormy night. When it is chilly, having a heater that is not working is a major cause of concern. This drain removes and drains water that is created in the heating process. Plumb-Tech technicians are ready to help you with your plumbing and heating needs. An electric ignitor does not require any pilot light and acts very similar to a gas stovetop. 2) Furnace overheated Let’s say your furnace blows hot air, then cold air, but then stops blowing any air at all after a while. It’s important not to overlook this issue, as it can cause damage to your furnace’s heat exchanger, which can be a costly repair. An electric heater and a gas furnace blowing cold air will be exactly the same, so give it a few minutes after you turn it on. The heating elements are turned on with a heavy duty relay called a contactor. Closed. Frequent overheating will likely cause damage to your heat exchanger, requiring a costly replacement. Start by turning your heater off and inspecting the filters. It’s Just Been Switched On – Any furnace will blow cold air when it starts up, since it takes time for hot air to travel through the system and into your home. What has Mordenkainen done to maintain the balance? Have an expert inspect your ducts along with the furnace. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. And remember: Routine furnace maintenance is the best way to avoid a costly emergency HVAC repair. Call us to learn more about our services or book an appointment. Where Do I Buy Dishwasher Salt in Missoula, Montana. A clogged filter will cause your furnace to work harder to push hot air throughout your home and can increase the likelihood of a costly furnace repair. Just like rebooting your computer, sometimes the system just needs a restart. Obviously, the best way to solve this problem is to find the root cause and eliminate it. This is a safety feature that turns off the burners to prevent a fire in your home. 11. Well this happens sometimes and a few things can be the cause. Is your home still maintaining its temperature? If your gas furnace is older and it’s blowing cold air, chances are its pilot light has gone out. This defeats the purpose of having the furnace on. This can contribute to cooler air flowing from your vents and through your heating system. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. This answer is not useful. Again, if you feel comfortable, trying unclogging the drain, and if not, make sure to contact a professional. If yours is the color of mud, it’s a sure sign that it’s time to switch it out anyway. Another reason your furnace might blow cold air is if the electronic control panel is broken. In that case, give us a call! Leaks in the ducts are a very common problem with electric furnaces. Why is my AC only blowing out Ice cold air and freezing over AC lines? Filters are cheap and easy to change. If your furnace is blowing cold air, not blowing any air at all, or making odd noises, it’s important to schedule a repair as soon as possible. Dirty air filters and other … Alternatively, you can call your local utility company or an HVAC technician to make sure it is lit safely. Heating systems are generally easy to maintain. In a furnace, the heat being produced and blowing into your home starts out at upwards of 110 or more degrees, often much higher than that. This air might not always be cold, and could be room temperature as well. Do you sometimes notice that your furnace is only blowing cold air on occasion? Why is “HADAT” the solution to the crossword clue "went after"? Again using Occam’s Razor, we can assume that the next likely culprit for your heater blowing cold air is your thermostat. Has your furnace been blowing cold air and you just can’t figure out why? Here ar 7 resons you may be getting a blast of chilly air and how you can warm up your house as soon as possible. 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