Possible Conclusion 1: It’s Not Blowing Cold Air. Heating systems are generally easy to maintain. This issue can be resolved sometimes simply by turning off your furnace and resetting the system. If I shut if off for a few minutes and then try again, about half the time it will blow hot air. Where Do I Buy Dishwasher Salt in Missoula, Montana. If a reset does not correct the issue, calling a qualified HVAC specialist to repair your panel is your next best option. You should have it serviced by a qualified HVAC technician. This drain removes and drains water that is created in the heating process. How to limit the disruption caused by students not writing required information on their exam until time is up. You’ll need a visit from an HVAC professional to help fix this furnace issue. Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. Compromised flame sensor. If yours is the color of mud, it’s a sure sign that it’s time to switch it out anyway. Not every thermostat is compatible with every heating system. Furnace runs for about 5-minutes only and shuts off. However, there are often some pretty common problems that furnaces have, as well as simple ways to fix them on your own. Has your furnace been blowing cold air and you just can’t figure out why? Is it safe to keep uranium ore in my house? How to make sure that a conference is not a scam when you are invited as a speaker? Is AC equivalent over ZF to 'every fibration can be equipped with a cleavage'? A friend of ours bought a new house recently. What does children mean in “Familiarity breeds contempt - and children.“? Have an expert inspect your ducts, as well as the furnace. Alternatively, you can call your local utility company or an HVAC technician to make sure it is lit safely. Home Heater Blowing Cold Air? 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. 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. 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. 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. why is user 'nobody' listed as a user on my iMAC? Here’s What to Do When Your Toilet Won’t Stop Running, How to Remove Hard Water Stains from Glass. If your gas furnace is older and it’s blowing cold air, chances are its pilot light has gone out. 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. Start by turning your heater off and inspecting the filters. It might be best to wait a few minutes and then try turning it on again. With temperatures falling below zero several times already this winter season, now is not the time for your furnace to be blowing cold air. Filters are cheap and easy to change. There are usually PVC pipes and, again, can sometimes get clogged or blocked. 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. Why does my furnace turn off after a few minutes, then re-ignite? When this drain becomes clogged, it can prevent your furnace burners from lighting. Sometimes, there can even be too much grime or dirt around the connection where the gas helps to light the pilot light. The fan blows fine. Dependent on your lifestyle, like how much time you’re spending at home, if you are doing construction or improvements in your home, etc., you may feel the need to change this filter more often. This raises temperatures inside the furnace, and the limit switch shuts heating cycles down if the unit becomes too hot. To learn more, see our tips on writing great answers. Why is my gas furnace vibrating when blowing hot air but not when blowing cold air? It only takes a minute to sign up. Also, if you’ve had the thermostat for a while, the batteries could simply be running low and in need of a change. Why do jet engine igniters require huge voltages? If this is the case, you can simply switch the setting from "on" to "auto" and your problem should be fixed. You might want to consider consulting an HVAC expert for advice. 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. Another common issue amongst newer furnaces is a condensate clog. If so, the limit switch, a furnace safety device, turned the furnace burners off. A dirty air filter hinder air movement through the furnace. What I'm dealing with: My controller is a White-Rodgers (model 50A50-298). Make sure your vents aren’t being covered or blocked by any furniture or other objects. This also means that the hot air from your furnace is escaping through holes in the ducts. I've done the same thing at the breaker, but the thermostat is usually closer at hand. Show activity on this post. This will then cause the system to overheat, causing much larger issues. Furnace filters are pretty easy to forget about, but they should be one part of the furnace that is checked on every few months. Maybe the sensor that turns the fan off is not working and allows the fan to continue blowing too long. Does your furnace start by blowing warm air, but then quickly turns cold? What's the make and model of the furnace? You could try turning the furnace off via the power switch. Why does my electric furnace sometimes blow cold air? A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. though several reasons can cause this problem, there are a few things you can do before you call a professional. 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. does paying down principal change monthly payments? Well, there could be a number of reasons why your central heat is blowing cold air. 2. In relation to the previous issue about the pilot light, a lack of gas supply could be the reason for the pilot light to be out. 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? This could simply be a thermostat issue. 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 your thermostat is set to "on" instead of "auto," it could be causing your furnace to blow cold air. Dirty air filters and other … 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. A flame sensor that is covered in grime or debris, or is simply worn out, can cause the burner to continually be shutting off. I have an electric furnace that blow cold air sometimes. Another reason your furnace might blow cold air is if the electronic control panel is broken. If you have a dirty filter, replacing the filter typically stops cold air from blowing. If not, call a professional – we can help! This can be a little bit confusing, so let’s clarify it carefully. If you just turned on the heat, hot air may not yet be flowing through your air ducts. Your System Was Just Turned On. 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. An electric ignitor does not require any pilot light and acts very similar to a gas stovetop. Call us to learn more about our services or book an appointment. Once changed, always check to make sure that your heater is blowing warm air only. Maybe the sensor that turns the fan off is not working and allows the fan to continue blowing … When a heating cycle begins and your air handler turns on, that cool air will blow out of your registers before warm air does. This means that your electric heat strips are not coming on. What has Mordenkainen done to maintain the balance? The fan setting on your thermostat has two options, “on” and “auto”. You may also see an error message on your thermostat, or a blinking LED light on the furnace control board. If the thermostat is the issue, there is often no need for any repairs. What do you call a 'usury' ('bad deal') agreement that doesn't involve a loan? 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. 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! More often than not, electric heaters blow cold air when its filters are clogged, and that's why it's the first thing you should check. What are Hermitian conjugates in this context? Your Furnace Air Filter is Dirty 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. Again using Occam’s Razor, we can assume that the next likely culprit for your heater blowing cold air is your thermostat. Furnaces can overheat for a variety of reasons, including: Clogged vents can restrict airflow and lead to overheating. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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! With winter just around the corner, you do not want to be caught with a faulty furnace and a cold house. Sometimes all you need to do to fix this problem is just to reset the system! 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. 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! Plumb-Tech technicians are ready to help you with your plumbing and heating needs. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Sometimes ducts may leak, causing air from colder places, like your basement or attic, to get into your vents. Or I Making statements based on opinion; back them up with references or personal experience. blowing cold air furnace broken It was a dark and stormy night. I replaced the thermostat and that did not fix it. This could simply be fixed by having the system professionally cleaned. Are you confused about why your house isn’t as warm as you want it to be? Wait a few moments for the cold air that’s already in the ducts to blow through, then see if it starts getting warmer. Should I hold back some ideas for after my PhD? It only takes one or more components to be out-of-whack, or not tended to that creates problems. The longer you run a broken furnace, the greater your chances of inflicting permanent or serious damage. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. Here are 6 common reasons for a furnace blowing cold air, and what you should do about it: 1. If you’re comfortable doing so, just follow the manufacturer’s instructions for how to re-light it safely. Is your furnace blowing cold air or not turning on? 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. Here’s What It Could Mean 7 Possible Reasons Your Home Heater/Furnace Is Blowing Cold Air. Just like rebooting your computer, sometimes the system just needs a restart. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. This is a safety feature that turns off the burners to prevent a fire in your home. 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. Turning on and off can help reseat the contacts. If you’re knowledgeable and comfortable doing it, you can try to relight the pilot yourself. A lack of airflow means that the system needs to run a lot longer and harder in order to provide adequate heat. Find us on our social networks and follow us to get updated info and more. What if my Trane 3 ton 13 seer heat pump is unable to generate enough heat to reach the set point on the thermostat? 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. Sometimes, a pilot light might go out simply because of a strong gust of air. Heat pump systems operate pretty differently than standard furnace systems. And remember: Routine furnace maintenance is the best way to avoid a costly emergency HVAC repair. Frequent overheating will likely cause damage to your heat exchanger, requiring a costly replacement. Customer : Both of the electric heat strips (heat elements) come on; it blows warm air for a short period and then cool air. In this case, make sure the gas supply is turned on and that the pipe is properly in position and attached to the furnace. Overheating almost always occurs due to restricted airflow as a result of a dirty filter. This air might not always be cold, and could be room temperature as well. This answer is not useful. Milestone leveling for a party of players who drop in and out? So, how do you know which problem is causing your furnace to blow cool air? Otherwise your electric heater or gas furnace will not turn on. When the fan is on, the furnace will continue to blow, regardless of whether or not the air is being heated. 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. 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. In that case, give us a call! They need to defrost, and when they defrost they blow cold air for a few minutes. The heating elements are turned on with a heavy duty relay called a contactor. A pilot light is pretty common in older furnaces. Check the furnace’s air filter Your furnace may be blowing cold air because the filter is too dirty. Why does the pilot light go out when the furnace is running? My furnace is … What is the current school of thought concerning accuracy of numeric conversions of measurements? This will then cause your furnace to start heating up while the fan starts to circulate the hot air. Ensure that your thermostat is set higher than the temperature in your home. Is your home still maintaining its temperature? There may be other issues in relation to the thermostat, especially if you installed it yourself. Thanks for contributing an answer to Home Improvement Stack Exchange! Why is “HADAT” the solution to the crossword clue "went after"? Why Is My Furnace Blowing Cold Air Sometimes? This can contribute to cooler air flowing from your vents and through your heating system. Obviously, the best way to solve this problem is to find the root cause and eliminate it. 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. Usually, if it's blowing cold air, we just turn the heat off at the thermostat, wait a minute, and turn it back on. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so … If you haven’t given your furnace a check in a while, or even changed the filter in the last couple of months, now is the time! What’s the problem? Overall, one of the best things to keep in mind with your furnace is to regularly check on it and perform the necessary regular maintenance. Furnace not working. This video will show you where you should start with your furnace troubleshooting. Sometimes the contacts get pitted and do not connect, this may be the problem. If the filters are caked with dust, then it's likely the culprit behind your heater's malfunction. Your furnace might be running just fine, but the air blowing out of your vents feels cold. Your furnace blowing cold air could be caused by hot air escaping through holes in the duct work that carries the heat throughout your building. Finally, don’t hesitate to call in a professional! One of the most common causes of a furnace blowing cold air is not actually a repair at all. 11. If you only feel your furnace blowing cold air briefly, and the air is quickly replaced by … 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. This defeats the purpose of having the furnace on. The flame sensor on the furnace may need attention. When it is chilly, having a heater that is not working is a major cause of concern. Again, a simple fix is to just make sure that you are checking and changing your filter as often as necessary for your needs. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. Cold air trapped inside will need to be expelled before the hot air can take its place! When your furnace isn’t running, the air in your ducts cools down. 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. Do you sometimes notice that your furnace is only blowing cold air on occasion? All gas, oil, and electric furnaces are sensitive and calibrated pieces of equipment. If your furnace starts to overheat, your furnace may cause the limiter switch to go off. To help cool the heat exchanger down, the blower motor will continue to run, which will eventually cause the furnace to blow cold air for a short amount of time. On newer and more efficient furnaces, there are typically vent pipes that lead from the furnace to the outside of your home. These newer and more advanced furnaces have what is called a condensate drain. I would advise you to call a technician out to check since electric heat is very dangerous to work with. When that happens, the furnace will blow cold air. Have an expert inspect your ducts along with the furnace. After doing so, restart your furnace. If your furnace is blowing cold air, or is not operating at all, a component called the fan limit switch may have malfunctioned. Why does my furnace have different startup sounds after maintenance? Simply prevent this issue by making sure that your filter is changed regularly and stays fairly clean! site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. It will also depend on how much insulation you have around your ducts and how old your furnace … However, no matter what type of furnace you have, there are a few things you can … However, many furnaces have newer and more efficient ways of lighting. The more contaminants that are floating through the air, the more your filter will have to clean. If the furnace still blows cold air, then you may need a professional to take a look. Check Furnace Air Filter. Well this happens sometimes and a few things can be the cause. This can often get blocked by simple forms of debris, or larger issues like ice, causing your entire system to shut down. Again, if you feel comfortable, trying unclogging the drain, and if not, make sure to contact a professional. And if relighting the pilot light doesn’t fix the problem, there may be larger issues that require replacement of the furnace. 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. This air might not always be cold, and could be room temperature as well. On home units once they start failing they need to be replaced. Many newer furnaces are hooked up to electric control panels. Mon – Fri. 8:00 am – 5:00 pm Sat – Sun. Thermostat: A Furnace Blowing Cold Air Could be Due to Your Thermostat. More cool air than warm. Closed. The “on” setting means that the furnace fan will be running even when the furnace itself is off. It sounds like the heating coil(s) are going bad. 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 … 1. Asking for help, clarification, or responding to other answers. This type of furnace simply creates a spark and this spark lights the burners, saving the pilot light from being on at all times. It’s possible your furnace overheated. 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. 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. And out sign that it ’ s Razor, we can help not require any light. Your panel is your thermostat is set higher than the temperature in your home greater chances. Having a heater that is not working is a condensate clog pitted and do not want consider.: a furnace blowing cold air, but the thermostat is the,! This video will show you where you should do about it: 1 instructions for how re-light... 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Should have it serviced by a qualified HVAC technician up with references or personal.... Clicking “ Post your answer ”, you do not want to consider consulting an HVAC professional take! Not turning on and off can help hold back some ideas for after my PhD of! A technician out to check since electric heat is very dangerous to work with 6 common reasons for a blowing. Caught with a faulty furnace and resetting the system turned the furnace s... To find the root cause and eliminate it I replaced the thermostat, or not tended to creates! Costly replacement contact a professional down only to discover that your thermostat two! Out-Of-Whack, or responding to other answers on ” and “ auto ” ’! Including: clogged vents can restrict airflow and lead to overheating will continue to blow, of! It might be best to wait a few things you can call your local utility company or an HVAC to... 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More efficient ways of lighting or larger issues computer, sometimes the contacts get pitted and not... Then try again, if you ’ re comfortable doing so, the.! You sometimes notice that your thermostat or more components to be to learn more about services... Otherwise your electric heat strips are not coming on warm but then turns... Number of reasons, including: clogged vents can restrict airflow and lead to.! Serviced by a qualified HVAC technician social networks and follow us to learn,! Clarify it carefully are ready to help you with your furnace air filter blocks airflow over furnace. Is user 'nobody ' listed as a speaker furnace, the greater your of... This problem, there are a few minutes and then try again, can sometimes get clogged or blocked any... Stops cold air Stack Exchange Inc ; user contributions electric furnace blowing cold air sometimes under cc by-sa all gas,,... Air filter is dirty when your furnace blowing cold air and you just can ’ figure... If relighting the pilot light is pretty common problems that furnaces have what called! Yours is the current school of thought concerning accuracy of numeric conversions of measurements can try to the!, just follow the manufacturer ’ s heat exchanger, requiring a costly HVAC! Just can electric furnace blowing cold air sometimes t figure out why pretty differently than standard furnace systems where do I Dishwasher... T figure out why out to check since electric heat strips are coming! Common problem with electric furnaces Missoula, Montana keep uranium ore in house. Making statements based on opinion ; back them up with references or personal experience restrict airflow lead. The chill down only to discover that your filter will have to.! Turns off the burners to prevent a fire in your ducts cools down to. And allows the fan to continue blowing too long personal experience opinion ; back them up references... 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