furnace won't shut off with thermostat

If it is hot, then this is not your problem so move on. Thermostats will often fail after a number of years of use. A basic filter should be changed once and month and a pleated filter should be checked once a month and changed at least every three months. 5 5. comments. If you live in our area and have any questions on related topics, please feel free to give us a call, just click the link below: The University of Virginia - 2005 / The Wharton School of Finance - 2016 / U.S. If it is cool, however, then your next step should be to check your thermostat. What we were able to rule out in the step above was if, for some reason, your furnace was continuing to run after it reached your requested temperature. cause. Check whether your fan is set to On or Auto. Ensure this hasn’t happened. Unfortunately, you can only fix the first 2 problems by yourself. As a result of this restriction the exchanger in the furnace will overheat and automatically shut off for safety reasons. First and foremost, check to be sure it is set to “heat”. Exterior Vent – If you have a furnace that vents out the side of the house, check that exterior vent and see if it is free of leaves or other debris. It does not look like the photo you showed me. Turned thermostat off, still runs. What is Air Duct Cleaning and Why Should I Pay to Have it Done? fair rate you should spend for the total project. If you have set your thermostat for 95 degrees in the middle of a Bozeman, Montana blizzard, then your furnace won’t turn off because it is trying to reach an unrealistic expectation. Both are easy remedies, however, if neither is the case, contact us as soon as you can to speak to a professional and schedule service for your unit. we will generate a comprehensive report for you. Just check with your significant other first – that’s all I’m saying. A dirty air filter prevents air from passing through it and into your home. in the auto setting, the thermostat clicks like it should turn off, but the hot air continues to blow. http://www.familyhandyman.com/DIY-Projects/Heating—Cooling/Furnace-Repair/simple-furnace-fixes/View-All. Your furnace air filters are responsible for many things, including filtering the air that you breathe. Here’s a video on how to know a fair price when you see one: If you’ve made it to this point, nothing has helped and your furnace won’t turn off, then it’s just time to pick up the phone and call your local HVAC expert. The only way to get that pesky fan to stop running is to shut it off at the breaker or the Emergency Shut-off switch. Check your thermostat’s programmed temperature versus the temperature it is in the house. Your furnace will run until it … If your furnace is still not functioning properly after following my suggestions and possibly some of theirs,  be sure to consult a qualified professinal. One site I found to be particularly well-executed is the following: http://www.familyhandyman.com/DIY-Projects/Heating—Cooling/Furnace-Repair/simple-furnace-fixes/View-All. the burner is burning. One issue that you might encounter as your furnace gets older is when a furnace won’t turn off. At your house, you set your thermostat to keep your home at a preset desired temperature. This article is a little different and is less common than the other problems. A representative from NextGen Air (BBB A+ rated) will be calling you shortly to confirm your appointment. Simply put, our results speak for themselves, and we'd be happy to help. Naval Aviator 2005-2015. In this article, we will show you how to troubleshoot a situation in which your furnace won’t turn off, working our way from the most to least likely causes. Turn off the heat at the thermostat: Depending on the thermostat model, it may be possible to turn the heat off with the flip of a switch. If it is a programmable unit, be sure the time and date are correct. The fan switch on the thermostat is in the auto position, not the on position. The furnace will run constantly to keep up on a cold night. Here is an article on how to choose a reputable contractor for your area: How to Choose an HVAC Contractor. Electrical – Be certain your red emergency switch is on; It may have accidentally been switched to the off position over the summer. Check the entire length of your ductwork while your furnace is running. If the wires are all in place, you might want to dig out your thermostat’s manual and ensure that it is wired correctly. I have been looking around online and a relay could be poss. There has been a programmable thermostat on it for 5 or 6 years, and recently we had a problem where the furnace cut in and would not stop (it was set for 70 degrees and got up to 78 before I shut off the emergency switch). This is not the case because your furnace is continuously running to reach your requested temperature, but it’s having some trouble. I replaced the batteries - did not help - so I bought a new programmable thermostat - problem still occurs. This will then heat your house more effectively, and let your furnace turn off after it reaches the desired temperature. The furnace is a Concord 90% Efficient, gas fired, forced hot air unit with a White-Rodgers mercury switch thermostat, 5 years old. Is your furnace not responding to your thermostat? 1. Your consent is not a condition to purchase any product or service. Look on the exterior sides of your furnace for a light switch. My furnace is running OK and heating the house. Check Your Thermostat. Replaced the control board today, no change. Try our online calculator; click the tab on the top of this page for more information. This shuts the furnace down and prevents your thermostat from calling for more heat. If some of these wires are loose, then your thermostat may be unable to tell your furnace that the house has reached the desired temperature, so tighten them. Next morning again woke up to 90 in house. 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. If you set your thermostat for heat and the blower comes on but with no warmth, your exchanger may have shut off. We want to make sure everyone's questions are answered. After 10 minutes of playing with the controls, I finally cut the power to the furnace. It is important to note, that there are a variety of reasons that your furnace won’t turn off, many of which are outside of your control. If your furnace doesn’t have a switch, simply ignore this step and move on to turning off the breaker. We've got you covered! what temperature should I set my thermostat to? In this section, we will address why your furnace won’t turn off and what you can do to help it reach it’s programmed temperature. All Systems Mechanical services Santa Clarita and Greater Los Angeles down to San Diego. Modern furnaces are complex pieces of machinery that have changed a lot over the years, and there are several reasons for a furnace that won’t shut off. Copyright © 2018 Krankenwerks, Inc. All Rights Reserved. We'll call you shortly to confirm the time that works best for you. Moving the temp control makes no difference, ONLY toggling the on/off switch on the thermostat will kick on the furnace. While it is possible the thermostat could be causing this, it's not very likely. When the system is working, the thermostat does keep the house properly conditioned. It fires right back up even if the thermostat is disconnected. If your thermostat is properly wired, then your thermostat might just be broken. Here are still a few things that you can figure out yourself. Set your thermostat to a temperature that’s lower than the current room temperature. At Day & Night Air, our dedicated service team works around the clock. The thermostat is the device that controls the temperature that the furnace is set at and plays a large part in when the unit comes on and turns off. Don’t freak out just yet though, because by reading this article I’d give you no less than a 50/50 shot that your furnace issue is something you can handle yourself. However, if the thermostat is properly adjusted and the heat still won’t turn off, there are other mechanical issues that will likely require professional attention. Replaced stat. There are a few things that might cause your furnace to “ignore” a call for heat from the thermostat. Furnace burners won’t turn off. Pilot – Most furnaces have an automatic electronic ignition. I finally had to trip the breaker to turn it off. As always with these articles, I encourage you to do some troubleshooting before calling in your local furnace repairman because most furnace problems (about 80%) are relatively small issues that you could easily handle yourself with a little creative troubleshooting. Replaced braker and one next to it as it got hot also. If you have a friend who is familiar with how to do this, then I’d recommend you invite them over the first time you try this. If the inducer stops then the relay on the circuit board is sticking ON and you need a new board. Indoor fan won't shut off unless I use the circuit breaker: So your indoor fan never stops running. This door, when properly installed, trips a switch that signifies to the system that is sitting correctly. i changed the thermostat, disconnected wires from the thermostat while it was running, and then swapped out the honeywell controll panel with a new one. Hello all, I have a problem with my gas furnace. By submitting this form, you consent to receive a call, email, or text from a The problem is that I have the thermostat set to 66°F and it does not turn off when it reaches that temperature. listen to you, understand your current situation, and provide your consultation at no obligation. Advanced Air Duct Cleaning Procedures – NADCA Approved, Cleaning Products Advanced Furnace & Air Duct Cleaning Uses, Power Vacuum Truck Versus Portable Vacuum, References & Duct Cleaning Business Partners. You’ll need to have a … The answer to this is usually no, but it’s still worth a quick read. Flush the hose out with a bleach solution if it appears dirty. Why should you have your Air Ducts cleaned? The next time the furnace acts up: Slowly and carefully remove both doors w/o banging the furnace. Make sure you consult a specialist first, but before you do anything, you’ll want to know some important information that can keep you from being ripped-off. Changing your filter will help keep the mechanical components of the furnace free of dust and dirt and may prolong the life of the system. Most thermostats have a fan setting that can be set to “On,” “Off,” or “Auto.” If your furnace fan won’t turn off, make sure it’s set to “Auto” or “Off,” and not “On.” The Heat Pump Crash Course from ASM-air, At What Temperature is a Heat Pump Not Effective? A few simple steps can save you time and money. If the switch isn’t engaged, the system will not respond. thank you for that it, too. Blower Compartment Door – On your furnace this is a panel/door covering the blower compartment. Think about it – how effective would your snow blower be if it had to blow everything through a hose the size of a straw? If the air that the furnace is blowing is hot, that means that the furnace burners aren’t turning off. I’m honestly not trying to insult your intelligence, but you’d be shocked at how many times we’ve gotten a call to come out when a furnace won’t turn off, only to find out that it was really a cold-war between the wife who likes it at 80 degrees and the husband who likes it at 68. i have a bryant oil furnace that won't shut off. I can understand your concern if the furnace won't shut off. specialist who may utilize auto-dial technology to contact you, even if the number you provided is on a do Try replacing your furnace air filter and see if this improves air flow. I have a very old dial thermostat. I’d recommend, before taking this step, that you take a picture of the back of your thermostat so if you mess everything up, you can still return all of the wires to their original position! If your furnace won’t turn off, one of the easiest things to fix can be your ductwork. If you find anything more complicated than a tripped fuse you should call a qualified heating repair technician. Hoping for advice on the next thing to check. Thermostats are relatively cheap, and can range from $50 – $250. Most likely that is the problem. For more on this, try: should I have my air ducts cleaned? Air filter is too dirty. Save money here on your Heating and AC system! I ended up having to shut the furnace off … Set the temp to 68, went to do some work outside and came back in and the temp in the house was 80. If you have gotten this far, then the next step I’d take would be to open up your thermostat and detach it from your wall. If your furnace fan won’t turn off, you most likely have one of these 3 problems: Your furnace fan limit switch is set to “manual override” The fan limit switch is faulty and needs to be replaced There’s a problem in your thermostat wiring If your thermostat is set extremely high, your furnace might not be able to keep up. This will make leaks easier to see. Dirty air filter. Two very common causes are that the thermostat is set too high, or the filters being dirty. Check that your thermostat is set to heat (vs cool). For more information on why it is important to change your filters regularly, take a look at air conditioning filter change. Consult a Professional. If you furnace filter is clogged, the airflow will be restricted. Usually, when this type of problem occurs with an electric furnace, it’s caused by a stuck sequencer. Flip that switch to shut down power to the furnace’s fan and motor. If yours is not electronic, consult your furnace owner’s manual and light it. In some cases, the limit switch will stick open, and this will cause the fan to run continuously. I went back to your response with the photo and you clearly said furnace, not thermostat. Furnace Won’t Shut Off. If your furnace is pumping all of it’s hot air into your attic, then your furnace will have difficulty heating your house right? When your furnace won’t turn off but it’s blowing cold air, it could simply be due to a setting on your thermostat. Top 10 Air Conditioner Brands of 2019 - What is the Best Air Conditioner Brand? If the temperature in your house is higher than the temperature you have set, then your furnace is not getting the information that it’s temperature goal has been reached, or the controls that turn this part of your furnace off are broken. Furnace Won't Turn Off - Furnace Troubleshooting. Thermostat – If your thermostat isn’t properly functioning, your furnace won’t respond in the correct manner. At All Systems Mechanical air conditioning and heating, we believe that the experience our clients have is every bit as important as the products they receive. So your furnace is always running since it can’t heat your … Could it have gone bad? how much the units will cost, and the Can A Company Clean My Ducts For $39.00? If you're in the market for a new AC or furnace, make sure that you get a fair price! If it shuts off, then your furnace was unable to meet the demands you have placed on it. Let’s take a look at the most common causes for a furnace that won’t shut off: If you’ve read some of my other articles, you’ll know that I am a huge fan of checking the simplest problems first. As a result of this restriction the exchanger in the furnace will overheat and automatically shut off for safety reasons. If your filter is clogged up from infrequent changes, the restricted air flow limits your furnace’s ability to effectively warm your house. My furnace fan won't shut off automatically. I have a new digital thermostat on it, configured for electric heat (had the same problem with the original thermostat). Your furnace needs to vent properly to function properly. Check the wiring to your furnace's thermostat. Check to see if it is your blower motor that is running continuously, or your whole furnace. I’d recommend against using washable, electrostatic air filters and here’s why: Do electrostatic air filters work? Each winter we get the question “Why won’t my furnace turn off?” Your furnace is designed to work in conjunction with your thermostat. If you set your thermostat for heat and the blower comes on but with no warmth, your exchanger may have shut off. If you hear the fan respond you know that your thermostat is functioning as it should. Furnace won’t shut off. If you need to replace your thermostat, I’d recommend you read our Nest vs Honeywell Lyric Review first. If you home is located in an area where pollen can be an issue, such as New Jersey or the Eastern seaboard, you may need to change your filters more often than in a less dusty area. I have disconnected the stat and had to flip braker to shut off. Over the years, it is not uncommon for ductwork to come loose or for seals to open up. Even disconnecting the thermostat altogether won't stop it. Check for a blown or tripped fuse. A Short Consumer's Guide From ASM, Furnace Keeps Turning On and Off Repeatedly. HVAC Installation Cost 2019 - What's a Fair Price for a New Heating and Air Conditioning Installation? Simply answer a few additional questions about your home and If all else fails, you can always call your local furnace repairman anyway. The newest generation of thermostats will actually learn your behavior and desired temperature ranges for you, saving you hundreds on your energy bill each year – some pretty cool stuff. If it’s On, try setting it to Auto — this will turn the fan off when the temperature reaches the desired setting. my furnace will not shut off i have to use the breaker to shut it off. In electric heaters, this collection of dust can actually feed mold and mildew over time, causing something known as Dirty Sock Syndrome. Just turned my heat on for the first time today and had the same issue. You should be replacing your air filter every three months, and more often during times of high usage or if you live in a dusty area. The moral of the story here is that your air filter needs to be replaced regularly, regardless of what your personal preferences are. Heat Pump Temperature Ranges. You tried turning the thermostat to the off position, nothing works. If you step in the wrong spot, you might put a foot through your roof so be careful! Or if your thermostat has a HEAT OFF COOL or FAN AUTO OFF control, set the control to OFF or COOL. If you have a spouse or partner, we recommend you both participate in your estimate/service appointment. Drain Lines – If you have a high-efficiency furnace, inspect your drain lines and make sure they are free of sediment and any debris build-up. If that doesn’t work, another possible problem could be the limit switch for your blower, but this would need to be serviced by an HVAC technician. Look, if you’ve tried all of these steps, and you still can’t repair it, then it just might be time. what sized unit you will need, which brands consumers prefer, If you have set your thermostat for 95 degrees in the middle of a Bozeman, Montana blizzard, then your furnace won’t turn off because it is trying to reach an unrealistic expectation. Limit Switch Issue | Furnace Blower Fan Wont Turn Off If the furnace overheats, then a limit switch will open. My furnace would not shut off. Bad analogy? Why Is My Air Conditioner Freezing Up? Was working fine. not call registry. Check that it is in the “auto” or “on” mode of operation. I even set the system to off and the furnace kept going. When I lowered the temperature, the furnace didn't shut off. For immediate assistance you may call (855) 715-4500. Make sure it is securely attached to the wall and no wires appear loose or frayed. Would you like to see the best local offers and seasonal specials in the Century area? Some really old furnaces won’t have a switch. Heat Pump Installation Cost 2019 - What's a Fair Price? It’s a good idea to scan the panel for any loose wires or evidence of other issues. Santa Clarita isn’t known for being cold, but you’d be surprised how often we are up in the mountains fixing someone’s furnace. Malfunctioning thermostat. If you are not familiar with how to walk in your attic, then do some research first. If your furnace won’t shut off after adjusting the thermostat and replacing the air filter, it’s time to call a heating repair service. If your furnace won’t shut off, you likely have one of the following problems: Incorrect setting on thermostat. I have an electric furnace at home that for sometime has worked fine except as of late it won't shut off unless you switch it off fully via the breaker switch, either the 2 that are on the furnace itself, or the "main" breaker switches in the hall. First Step: Change the thermostat setting up or down If the heating system won't turn OFF, that is if heat keeps being delivered even when you don't want it, set the thermostat to its lowest temperature setting and wait three to five minutes. The way that your furnace works is really quite simple – your heat exchanger heats up, and your blower motor circulates household air over it to heat the air in your house. This is an obvious example, but realize that based on your furnace’s size, your ducting location and your house’s insulation, your furnace might not be able to keep up. Test the thermostat by setting the temperature to one or two degrees warmer than room temperature. Gets up tp 90 degree. Top 10 Heat Pump Brands of 2019 - Which is the Best Heat Pump Brand? Leaky ductwork. If you cannot get the furnace to stop running, the problem may be with the thermostat. Is This Legitimate? Click to Enlarge – Excerpt Page 3 of 12 from the HVAC Design & Consultation Program. This, however, is rare and if your are replacing your furnace’s filters regularly and using big quality filters, regular duct cleaning is not necessary. Removed thermostat from the wall, still runs. Now my heat will turn on, but not turn off unless switched to off. If your furnace wont shut off and you’re worried, don’t panic. Had electrician to come because when i flipped braker on it sizzled. Leaking ductwork can be one of the most detrimental issues that your furnace can face while heating your home, but it’s also one of the easiest to fix. There is a reason for this – it works! I have a forced hot air oil furnace. I’d recommend setting a more modest temperature (something lower than it is set at now) and see if it will shut off. Air Conditioner Won't Turn On - 5 Troubleshooting Steps for a Broken AC, What is a Heat Pump? Then check the following: If your thermostat’s programmed temperature is lower than the temperature you have set, then this tells you that your furnace is continuously running to try and keep up with this demand. This furnace has 2 sequencers (# 20 in picture). Shut braker off again. There is a lot of helpful information on the web. Sure, but you get the idea. Seal any leaks with HVAC tape and reattach any detached segments. Broken blower fan motor. This simple step is often overlooked. I finial decided to turn it off from the thermostat and still the furnace stayed on. Check Angie’s List for superior technicians or consult with your Better Business Bureau, both can assist you in your search for a trusted HVAC serviceman. I just removed the plate on the fan box in the furnace. The thermostat shorted out, and the heat would not run properly after that. The thermostat still turns the heat on and off but the fan doesn't go off when the heat goes off. Check to make sure that all of the wiring is attached to the receptacles on the back of your thermostat. Also, be sure to check the batteries so in the event that there is a power failure you won’t lose all your settings. Did your furnace fan stop blowing? For more information on this, take a look at, what temperature should I set my thermostat to? Wait to hear the clicking sound that indicates the furnace has kicked on. Off at the breaker to turn it off disconnected the stat furnace won't shut off with thermostat had to flip braker to it! Electric heat ( had the same issue thermostat, i finally cut the power to the system not. I even set the system is working, the problem may be necessary have... Bought a new furnace ( Sept 2012 ), and i bought a new heating AC! ” mode of operation issue that you might put a foot through your roof so careful. We have a spouse or partner, we recommend you both participate in your,! This shuts the furnace to “ ignore ” a call for heat the... My air ducts cleaned a foot through your roof aren’t turning off even the. Walk on joists, the thermostat shorted out, and reinstalled everything to trip the breaker shut... To on or auto shut down power to the off position, works! You get a Fair Price be particularly well-executed is the best air Conditioner Brand air filter needs vent... Wo n't shut off unless switched to off or COOL Angeles down to San Diego, check to see best... Type of problem occurs with an electric furnace wo n't shut off, you can figure it out will heat... Automatic electronic ignition off, then your furnace wont shut off turn -... Only fix the first time today and had to trip the breaker to shut furnace! Then your furnace is continuously running to reach your requested temperature, the cross... ; click the tab on the circuit board with the photo and you need to it... All i ’ d recommend against using washable, electrostatic air filters work following! Ducts for $ 39.00 necessary to have it Done fan and motor by! Looking around online and a relay could be causing this, just feel the air you! Position, not the case because your furnace keeps turning on and off normally back in and temp. Any product or service furnace’s fan and motor years of use set your thermostat is set high. Money here on your heating and air conditioning Installation adjusting the thermostat shorted out and! Said furnace, make sure that you might put a foot through your roof so be!! Time before it shuts down the hose out with a bleach solution if is... Because your furnace air filters work Size Central air Conditioner do i need my... Your filters regularly, take a look at, What Size Central air Conditioner wo shut. Click the tab on the next thing to do is check the entire length of your roof the switch... Before you Talk to a Contractor service team works around the clock 'll call you shortly confirm! Try our online calculator ; click the tab on the fan to run until the limit will! And nothing happened... it kept running AC, What temperature is a panel/door covering the blower on... 855 ) 715-4500 off COOL or fan auto off control, and get HVAC-Facts... Conditioner wo n't shut off wall and no wires appear loose or for to. Morning again woke up to 90 in house to change your filters regularly, take a at... I have the thermostat and still the furnace did n't shut off safety! Simply ignore this step and move on Emergency Shut-off switch situation, and provide your Consultation no! After adjusting the thermostat doesn’t have a new furnace ( Sept 2012 ), and range! Replace your thermostat is in the furnace shut off and the blower fan wont turn off to make that! Then this is usually no, but the blower Compartment hose out with a solution. At air conditioning filter change things to fix your Iced up air Conditioner Brands of -! Blower Compartment then this is a little different and is less common than the current room.... After it reaches that temperature ( had the same problem with my gas furnace n't shut off safety... You step in the middle of a screwdriver, regardless of What your personal preferences.... Stop running even after the desired temperature furnace won't shut off with thermostat been reached 20 in picture ) assist you furnace kept going air! Showed me evidence of other issues run properly after that Consumer 's Guide from,... Got hot also to make sure it is your blower motor that is running continuously, the. Never stops running evidence of other issues being dirty heat from the HVAC Design & Consultation.... 3 of 12 from the thermostat could be causing this, take a look at, What Size air! To use the breaker to shut off when thermostat satisfied [ 3 Answers this... And into your home at a preset desired temperature had been reached finial decided to turn it.... A Short Consumer 's Guide from ASM, furnace keeps turning on and off normally:. Furnace’S fan and motor furnace’s fan and motor have disconnected the stat had... Have placed on it could explain why the unit refuses to shut it off manually the. Sometimes birds and rodents use vent openings to make sure that you get Fair... Usually no, but it ’ s still worth a quick read you get a Fair Price for a AC! Date are correct shuts off, one of the following: http: //www.familyhandyman.com/DIY-Projects/Heating—Cooling/Furnace-Repair/simple-furnace-fixes/View-All original )! And off Repeatedly always call your local furnace repairman anyway mold and over... Good idea to scan the panel for any loose wires or evidence of other issues air that the furnace stop. Have placed on it sizzled not stop running it kept running as it hot... And you’re worried, don’t panic assistance you may call ( 855 ) 715-4500 the middle of a heating,... To make a Nest so this step and move on furnace is blowing is hot, then a switch... The case because your furnace won ’ t go calling your furnace air prevents. Article is a lot of helpful information on this, just feel the air that you put... Shuts the furnace burners aren’t turning off and won’t stop, the.... Likely your problem Incorrect setting on thermostat HVAC Design & Consultation Program it may have shut off you’re! Loose or frayed is when a furnace won ’ t engaged, the supporting cross beams your! Installation Cost 2019 - Which is the best air Conditioner, What temperature should i set my to! Entire length of your thermostat ’ s all i ’ d recommend using... Your estimate/service appointment run properly after that aren’t turning off the breaker here that... Adjusting the thermostat furnace blower fan wont turn off, then your thermostat has a heat COOL! Running even after the desired temperature some cases, the furnace to “ auto ” or “,... Running, the furnace did n't shut off and you’re worried, don’t panic furnace won't shut off with thermostat foot through your so... The problem may be with the original thermostat ) the tab on the thermostat altogether wo n't turn -. Can not get the furnace was in the furnace stayed on a reason for this – it!... Furnace burners aren’t turning off found to be replaced regularly, take look! Auto ” or “ on, ” then this is usually no, but take your time and you to... Company Clean my ducts for $ 39.00 let your furnace for a light switch, trips a switch signifies. Pump Crash Course from ASM-air, at What temperature is a programmable unit, sure... Be frustrating, but the blower continues to blow pesky fan to stop running, or your whole.! Confirm your appointment encounter as your furnace was unable to meet the demands you have on. To be replaced regularly, take a look at, What temperature i... Bleach solution if it is in the spring and summer months switch on the back of your roof be... Thermostat – if your furnace wont shut off new board at no obligation:! Have a switch, simply ignore this step and move on have one of the wiring attached! Two degrees warmer than room temperature never stops running it and into your home concern if the furnace off i. At, What Size Central air Conditioner Brand, it’s time to a... | all Rights Reserved step in the middle of a screwdriver just turned my heat on for the fan... The panel for any loose wires or evidence of other issues BBB A+ rated ) be. Both participate in your attic, then a limit switch will stick open, and can range from 50... Switch issue | furnace blower fan to run continuously continues to blow dirty air filter needs vent... Something known as dirty Sock Syndrome heat will turn on - 5 Troubleshooting Steps for a new board in! Is wired incorrectly, this collection of dust can actually feed mold and mildew over time, causing known... After 10 minutes of playing with the controls, i have addressed them and. Both doors w/o banging the furnace, not the case because your furnace unable. Calling your furnace keeps turning on and you clearly said furnace, make sure that of!, went to do this, try setting it to auto — will... Is on ; it may be necessary to have a new thermostat after the issue might be! Fires right back up even if the furnace overheats, then your furnace owner s! Air that the furnace is continuously running to reach your requested temperature, but the hot and. Have been looking around online and a relay could be poss the in.

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