With temperatures falling below zero several times already this winter season, now is not the time for your furnace to be blowing cold air. This means that your electric heat strips are not coming on. More cool air than warm. Dirty air filters and other … Is it safe to keep uranium ore in my house? If you just turned on the heat, hot air may not yet be flowing through your air ducts. Have an expert inspect your ducts, as well as the furnace. A friend of ours bought a new house recently. 1. Thanks for contributing an answer to Home Improvement Stack Exchange! This is a safety feature that turns off the burners to prevent a fire in your home. 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. Find us on our social networks and follow us to get updated info and more. What I'm dealing with: My controller is a White-Rodgers (model 50A50-298). We’d love to take the load off and help you as much as we can, so don’t hesitate to give us a call! If yours is the color of mud, it’s a sure sign that it’s time to switch it out anyway. Just like rebooting your computer, sometimes the system just needs a restart. Has your furnace been blowing cold air and you just can’t figure out why? Filters are cheap and easy to change. I replaced the thermostat and that did not fix it. 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. If you have a dirty filter, replacing the filter typically stops cold air from blowing. It only takes a minute to sign up. If your gas furnace is older and it’s blowing cold air, chances are its pilot light has gone out. Also, if you’ve had the thermostat for a while, the batteries could simply be running low and in need of a change. What has Mordenkainen done to maintain the balance? This can often get blocked by simple forms of debris, or larger issues like ice, causing your entire system to shut down. Does your furnace start by blowing warm air, but then quickly turns cold? 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. Sometimes all you need to do to fix this problem is just to reset the system! A flame sensor that is covered in grime or debris, or is simply worn out, can cause the burner to continually be shutting off. Why does my furnace turn off after a few minutes, then re-ignite? When a heating cycle begins and your air handler turns on, that cool air will blow out of your registers before warm air does. The more contaminants that are floating through the air, the more your filter will have to clean. It’s always better to be safe than sorry, especially if you don’t feel comfortable fixing, or even checking for, issues regarding your central heating system. Sometimes, a pilot light might go out simply because of a strong gust of air. There may be other issues in relation to the thermostat, especially if you installed it yourself. I would advise you to call a technician out to check since electric heat is very dangerous to work with. If your furnace starts to overheat, your furnace may cause the limiter switch to go off. Not every thermostat is compatible with every heating system. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. This could simply be a thermostat issue. What's the make and model of the furnace? Is AC equivalent over ZF to 'every fibration can be equipped with a cleavage'? If the issue is ongoing, for example, if ice or snow has a tendency to pile up where the pipes lead to the outside of your house, consider bringing in a professional to move this piping to a more convenient place. What’s the problem? If you don’t know what a pilot light is, it’s a small flame that runs at all times in order to light the burners in your furnace. Show activity on this post. Plumb-Tech technicians are ready to help you with your plumbing and heating needs. Why do jet engine igniters require huge voltages? does paying down principal change monthly payments? Wait a few moments for the cold air that’s already in the ducts to blow through, then see if it starts getting warmer. The flame sensor on the furnace may need attention. How to make sure that a conference is not a scam when you are invited as a speaker? Again using Occam’s Razor, we can assume that the next likely culprit for your heater blowing cold air is your thermostat. Alternatively, you can call your local utility company or an HVAC technician to make sure it is lit safely. Why does my furnace have different startup sounds after maintenance? What does children mean in “Familiarity breeds contempt - and children.“? Home Heater Blowing Cold Air? Ensure that your thermostat is set higher than the temperature in your home. I have an electric furnace that blow cold air sometimes. This issue can be resolved sometimes simply by turning off your furnace and resetting the system. One of the most common causes of a furnace blowing cold air is not actually a repair at all. However, there are often some pretty common problems that furnaces have, as well as simple ways to fix them on your own. Have an expert inspect your ducts along with the furnace. Many issues can be prevented simply by regularly cleaning to prevent grime, debris, and clogging, some of the most common problems that are found in problematic furnaces! On newer and more efficient furnaces, there are typically vent pipes that lead from the furnace to the outside of your home. How to limit the disruption caused by students not writing required information on their exam until time is up. Otherwise your electric heater or gas furnace will not turn on. Finally, don’t hesitate to call in a professional! 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. One way to fix this issue is by turning your setting to “auto.” In this case, the furnace fan will turn on automatically when your home’s thermostat recognizes that the house is at a different temperature than what it’s been set to. Is your furnace blowing cold air or not turning on? Well, if your furnace is blowing cold air, it’s most likely due to one of these problems: Your thermostat settings need to be adjusted; You have leaky air ducts; Your fan limit switch settings need to be adjusted; Your furnace is overheating; Yeah, that’s a lot of possibilities. An electric ignitor does not require any pilot light and acts very similar to a gas stovetop. Maybe the sensor that turns the fan off is not working and allows the fan to continue blowing too long. Mon – Fri. 8:00 am – 5:00 pm Sat – Sun. In this case, make sure the gas supply is turned on and that the pipe is properly in position and attached to the furnace. Again, if you feel comfortable, trying unclogging the drain, and if not, make sure to contact a professional. This air might not always be cold, and could be room temperature as well. This answer is not useful. why does sometimes my electric furnace only blow out cold air but if i flip the breaker off and what a few sec and flip it back on it fixes the problem and it starts blowing out warm air … Here are 6 common reasons for a furnace blowing cold air, and what you should do about it: 1. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Heating systems are generally easy to maintain. This defeats the purpose of having the furnace on. The thermostat of your furnace has a fan with two different settings: “on” and “auto.” The “on” setting means that the furnace fan will be running even when the furnace itself is off. If I shut if off for a few minutes and then try again, about half the time it will blow hot air. Why is my gas furnace vibrating when blowing hot air but not when blowing cold air? Is your home still maintaining its temperature? If not, call a professional – we can help! 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. If you’re knowledgeable and comfortable doing it, you can try to relight the pilot yourself. This will then cause your furnace to start heating up while the fan starts to circulate the hot air. If the furnace still blows cold air, then you may need a professional to take a look. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. 11. Why is my AC only blowing out Ice cold air and freezing over AC lines? It’s possible your furnace overheated. Furnace not working. It sounds like the heating coil(s) are going bad. though several reasons can cause this problem, there are a few things you can do before you call a professional. This type of furnace simply creates a spark and this spark lights the burners, saving the pilot light from being on at all times. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Overheating almost always occurs due to restricted airflow as a result of a dirty filter. Why does my electric furnace sometimes blow cold air? In this case, you could feel cold (or non-heated) air blowing through your vents because the system is not actually on to heat it. You might want to consider consulting an HVAC expert for advice. Are you confused about why your house isn’t as warm as you want it to be? Furnace filters are pretty easy to forget about, but they should be one part of the furnace that is checked on every few months. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. Sometimes, there can even be too much grime or dirt around the connection where the gas helps to light the pilot light. When the thermostat stops calling for heat, the furnace will turn the electric heating coils off, but allow the fan to continue blowing air until the coils cool down. Your furnace might be running just fine, but the air blowing out of your vents feels cold. What if my Trane 3 ton 13 seer heat pump is unable to generate enough heat to reach the set point on the thermostat? blowing cold air furnace broken It was a dark and stormy night. This could simply be fixed by having the system professionally cleaned. If your thermostat is set to "on" instead of "auto," it could be causing your furnace to blow cold air. 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. Start by turning your heater off and inspecting the filters. Just as a disclaimer, it can never hurt to get a professional to look at these sorts of issues, especially if you feel that you may put yourself at risk by trying to determine or solve the issue. These newer and more advanced furnaces have what is called a condensate drain. When your furnace isn’t running, the air in your ducts cools down. If your furnace is blowing cold air, or is not operating at all, a component called the fan limit switch may have malfunctioned. Once changed, always check to make sure that your heater is blowing warm air only. After doing so, restart your furnace. Compromised flame sensor. This raises temperatures inside the furnace, and the limit switch shuts heating cycles down if the unit becomes too hot. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so … Thermostat: A Furnace Blowing Cold Air Could be Due to Your Thermostat. This will then cause the system to overheat, causing much larger issues. My furnace is … We’ve compiled a list of some of the most common issues that may be causing your furnace to act up, as well as things you can do to fix it! Heat pump systems operate pretty differently than standard furnace systems. A dirty air filter hinder air movement through the furnace. Well, there could be a number of reasons why your central heat is blowing cold air. Do you sometimes notice that your furnace is only blowing cold air on occasion? Obviously, the best way to solve this problem is to find the root cause and eliminate it. 2. rev 2021.1.18.38333, The best answers are voted up and rise to the top, Home Improvement Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Should I hold back some ideas for after my PhD? 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