This can be a little bit confusing, so let’s clarify it carefully. 2. Call us to learn more about our services or book an appointment. And if relighting the pilot light doesn’t fix the problem, there may be larger issues that require replacement of the furnace. The fan setting on your thermostat has two options, “on” and “auto”. Many newer furnaces are hooked up to electric control panels. It might be best to wait a few minutes and then try turning it on again. Why is my AC only blowing out Ice cold air and freezing over AC lines? If not, call a professional – we can help! 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. 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. Obviously, the best way to solve this problem is to find the root cause and eliminate it. However, many furnaces have newer and more efficient ways of lighting. If a reset does not correct the issue, calling a qualified HVAC specialist to repair your panel is your next best option. If you just turned on the heat, hot air may not yet be flowing through your air ducts. 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. Leaks in the ducts are a very common problem with electric furnaces. The “on” setting means that the furnace fan will be running even when the furnace itself is off. Mon – Fri. 8:00 am – 5:00 pm Sat – Sun. On newer and more efficient furnaces, there are typically vent pipes that lead from the furnace to the outside of your home. With winter just around the corner, you do not want to be caught with a faulty furnace and a cold house. Why does my furnace have different startup sounds after maintenance? 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. Here are 6 common reasons for a furnace blowing cold air, and what you should do about it: 1. Maybe the sensor that turns the fan off is not working and allows the fan to continue blowing … 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. The heating elements are turned on with a heavy duty relay called a contactor. When that happens, the furnace will blow cold air. If your thermostat is set to "on" instead of "auto," it could be causing your furnace to blow cold air. 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. Here’s What It Could Mean 7 Possible Reasons Your Home Heater/Furnace Is Blowing Cold Air. Also, if you’ve had the thermostat for a while, the batteries could simply be running low and in need of a change. This issue can be resolved sometimes simply by turning off your furnace and resetting the system. Why do jet engine igniters require huge voltages? Well, there could be a number of reasons why your central heat is blowing cold air. Not every thermostat is compatible with every heating system. 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. Here’s What to Do When Your Toilet Won’t Stop Running, How to Remove Hard Water Stains from Glass. 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 the filters are caked with dust, then it's likely the culprit behind your heater's malfunction. Closed. If you’re knowledgeable and comfortable doing it, you can try to relight the pilot yourself. Another common issue amongst newer furnaces is a condensate clog. I have an electric furnace that blow cold air sometimes. If I shut if off for a few minutes and then try again, about half the time it will blow hot air. Possible Conclusion 1: It’s Not Blowing Cold Air. Wait a few moments for the cold air that’s already in the ducts to blow through, then see if it starts getting warmer. 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. Is AC equivalent over ZF to 'every fibration can be equipped with a cleavage'? Overheating almost always occurs due to restricted airflow as a result of a dirty filter. Your furnace might be running just fine, but the air blowing out of your vents feels cold. There may be other issues in relation to the thermostat, especially if you installed it yourself. This will then cause your furnace to start heating up while the fan starts to circulate the hot air. Simply prevent this issue by making sure that your filter is changed regularly and stays fairly clean! Why does my electric furnace sometimes blow cold air? The more contaminants that are floating through the air, the more your filter will have to clean. Cold air trapped inside will need to be expelled before the hot air can take its place! 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. Why does my furnace turn off after a few minutes, then re-ignite? Make sure your vents aren’t being covered or blocked by any furniture or other objects. However, there are often some pretty common problems that furnaces have, as well as simple ways to fix them on your own. Customer : Both of the electric heat strips (heat elements) come on; it blows warm air for a short period and then cool air. It only takes one or more components to be out-of-whack, or not tended to that creates problems. 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. 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. My furnace is … Why is “HADAT” the solution to the crossword clue "went after"? This is a safety feature that turns off the burners to prevent a fire in your home. Again, a simple fix is to just make sure that you are checking and changing your filter as often as necessary for your needs. It’s possible your furnace overheated. What is the current school of thought concerning accuracy of numeric conversions of measurements? When your furnace isn’t running, the air in your ducts cools down. When the fan is on, the furnace will continue to blow, regardless of whether or not the air is being heated. Why is my gas furnace vibrating when blowing hot air but not when blowing cold air? Plumb-Tech technicians are ready to help you with your plumbing and heating needs. This could simply be a thermostat issue. Again using Occam’s Razor, we can assume that the next likely culprit for your heater blowing cold air is your thermostat. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. If so, the limit switch, a furnace safety device, turned the furnace burners off. There are usually PVC pipes and, again, can sometimes get clogged or blocked. Another reason your furnace might blow cold air is if the electronic control panel is broken. 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. Finally, don’t hesitate to call in a professional! If this is the case, you can simply switch the setting from "on" to "auto" and your problem should be fixed. 1. Why Is My Furnace Blowing Cold Air Sometimes? 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. Is your furnace blowing cold air or not turning on? 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. 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. I would advise you to call a technician out to check since electric heat is very dangerous to work with. What's the make and model of the furnace? Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. 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. What are Hermitian conjugates in this context? though several reasons can cause this problem, there are a few things you can do before you call a professional. All gas, oil, and electric furnaces are sensitive and calibrated pieces of equipment. What if my Trane 3 ton 13 seer heat pump is unable to generate enough heat to reach the set point on the thermostat? On home units once they start failing they need to be replaced. This drain removes and drains water that is created in the heating process. 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 … Furnace filters are pretty easy to forget about, but they should be one part of the furnace that is checked on every few months. If your furnace starts to overheat, your furnace may cause the limiter switch to go off. I've done the same thing at the breaker, but the thermostat is usually closer at hand. If the thermostat is the issue, there is often no need for any repairs. Milestone leveling for a party of players who drop in and out? Furnaces can overheat for a variety of reasons, including: Clogged vents can restrict airflow and lead to overheating. In that case, give us a call! This could simply be fixed by having the system professionally cleaned. Or I An electric ignitor does not require any pilot light and acts very similar to a gas stovetop. They need to defrost, and when they defrost they blow cold air for a few minutes. 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. However, no matter what type of furnace you have, there are a few things you can … 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. 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. This video will show you where you should start with your furnace troubleshooting. Thermostat: A Furnace Blowing Cold Air Could be Due to Your Thermostat. 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. Well this happens sometimes and a few things can be the cause. 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. Thanks for contributing an answer to Home Improvement Stack Exchange! A friend of ours bought a new house recently. Sometimes, there can even be too much grime or dirt around the connection where the gas helps to light the pilot light. Dirty air filters and other … Furnace runs for about 5-minutes only and shuts off. These newer and more advanced furnaces have what is called a condensate drain. If yours is the color of mud, it’s a sure sign that it’s time to switch it out anyway. What I'm dealing with: My controller is a White-Rodgers (model 50A50-298). This also means that the hot air from your furnace is escaping through holes in the ducts. This air might not always be cold, and could be room temperature as well. The fan blows fine. To learn more, see our tips on writing great answers. In this case, make sure the gas supply is turned on and that the pipe is properly in position and attached to the furnace. Furnace not working. Otherwise your electric heater or gas furnace will not turn on. You could try turning the furnace off via the power switch. If you only feel your furnace blowing cold air briefly, and the air is quickly replaced by … When it is chilly, having a heater that is not working is a major cause of concern. Is it safe to keep uranium ore in my house? It sounds like the heating coil(s) are going bad. Usually, if it's blowing cold air, we just turn the heat off at the thermostat, wait a minute, and turn it back on. Alternatively, you can call your local utility company or an HVAC technician to make sure it is lit safely. Check the furnace’s air filter Your furnace may be blowing cold air because the filter is too dirty. More cool air than warm. This defeats the purpose of having the furnace on. You’ll need a visit from an HVAC professional to help fix this furnace issue. If your furnace is blowing cold air, or is not operating at all, a component called the fan limit switch may have malfunctioned. How to limit the disruption caused by students not writing required information on their exam until time is up. 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