Furnace blower won’t turn off. If you are lucky, you will find the problem there. Problem: Fan on your furnace runs all the time and will not shut off. Questions of a Do It Yourself nature should be The side effect has been that the furnace blower will not shut off. More modern gas furnaces will have a control board. In case the furnace turns off when the thermostat is … I have a 20+ year old forced air gas with central air. In case the furnace blower does not turn off and it is not bringing cold air, the furnace is still lit. Locate the blower compartment with the inspection window. A thorough cleaning should be enough to eradicate the sound for good. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. My furnace is running OK and heating the house. Can’t find limit switch. Next they actually disconnected the wire from the on/off switch, but the blower continues to blow. Other gas appliances such as stove, hot water tank, gas dryer work well. If the furnace blower does not turn off, turns off too quickly or not quickly enough, as it blows cold air towards the end of the heating cycle, then the glitch is possibly a bad temperature control switch. If your furnace won’t turn off, the easiest issue to fix is your thermostat. In this case, the fan motor needs replacing. This problem is easily rectified by turning the switch to automatic on the thermostat. This gas valve and blower keep cycling on and off since the blower fan does not turn on and the temp is still low. It won't shut off … You may freely link My furnace seems to be heating okay it is just the blower will not shut off. submitted to our "DoItYourself.com Community Forums". My Furnace Won’t Shut Off. The gas switch must be located in front of the furnace. Inspect your blower if your furnace won’t start. A furnace that is working hard to keep a high temperature, especially when it’s extra cold outside, can seem to run continuously. I have an older Rheem furnace and last summer we replaced my central air until with a Goodman 2 ton unit. On 2017-10-28 by james. The technician comes out and discovers that the safety switch on the blower door was not engaged, which cut off power to the thermostat. Your email address will not be published. I can turn it off manually at the thermostat but the blower continues to run for a very long time before it shuts down. I have a Carrier 58GS series Upflow Gas-Fired Furnace. A furnace that utilizes forced-hot-air is made of the plenum, the furnace blower, and the burner. This isn't that uncommon on Coleman electric furnaces, most likely it's the sequencer, you can completely disconnect the thermostat and if it's still on it's a pretty good indicator that it's the sequencer. Blower motor won't turn off [ 3 Answers ] I have a Carrier central air and furnace model 28GS 036 000. Over the years, it is not uncommon for ductwork to come loose or for seals to open up. Older furnaces will use either a sequencer relay or a simple peanut relay. In my case, it wouldn't run in "fan always on" mode either. If your thermostat is set extremely high, your furnace might not be able to keep up. Website operating About a month ago we had... My gas furnace makes multiple attempts and then start. However, in some instances, homeowners find that the furnace fan continuously runs and won’t turn off. On 2017-10-31 by Anonymous. I have an older Rheem furnace and last summer we replaced my central air until with a Goodman 2 ton unit. If the furnace is still lit, do not turn off the blower. Initially, the burner will turn off and then the blower would turn off as well. These cookies do not store any personal information. Set the temp about 5 or so degrees above the current room temperature. It is perfectly normal for the burner to continue to cycle on and off while the furnace is running. When your furnace isn’t actually heating, though, your furnace blower shouldn’t be running at all. Furnace burner turns off when fan turns on. Don’t try to survive all season without a furnace. They called me tonight saying the furnace blower won't turn off. However, when the switch is in bad condition and will not close, the furnace board would continue to run the blower endlessly. However, in some instances, homeowners find that the furnace fan continuously runs and won’t turn off. Copyright© Older furnaces will use either a sequencer relay or a simple peanut relay. Active 1 year, 11 months ago. After it warms up a limit switch, the blower relay starts the blower. Necessary cookies are absolutely essential for the website to function properly. It will also cause your system NOT to heat, so I doubt this is related to your problem. Still, problems or potential problems can be found and rectified before they do become a problem and fail. A furnace blower motor that stops pushing warm air out is not the same as a blower that is forcing only cold air into your home. My Furnace Won’t Shut Off. Not sure what year but I was tol... there is a ten year old thread on this; let me summarize. On the whole, the temperature control switches cannot be adjusted and are to be changed if they are defective. I have a nat gas, forced air, Bryant Plus 90 model 398AAWW060120D furnace, that is approx 25 to 30 years old. This season my actual thermostat was working just fine but because it was so old some of the plastic broke off and we decided to replace it. One of the primary causes of a humming furnace is dirty gas burners. Thermostat or fan relay switch problem - Turn the thermostat to OFF. There are two basic ways you can adjust your thermostat to ensure it isn’t what’s keeping your blower running. 1. You need to replace the switch right away if you think it’s not working. silver dial on fan control switch sticks. If the furnace is still lit, do not turn off the blower. If your fan was set to run continuously at either the thermostat or at the limit switch you'll need to turn that feature off. Even though we’ve had a warmer than average winter here in East Tennessee, we’re still having the occasional blast of winter air, causing people to crank those furnaces up one more time. I had a similar problem several months ago - house wasn't warming up much, found that furnace would go on but blower wouldn't and after a few minutes of running, furnace would turn off - presumably due to some high temperature limit being triggered by the heat not being dissipated by blowing air. Overtime the ductwork in your home may become loose or seals may open up. If that does not stop the furnace blower, switch off the thermostat. This website uses cookies to improve your experience. If the furnace overheats, then a limit switch will open. Don’t try to survive all season without a furnace. The blower motor keeps running. The problem is that the blower motor never stops running. Do you have an older furnace with a standing pilot light? There are many possible causes for an ill-functioning furnace. Good luck and happy heating!!! Furnace - Thermostat. View our Privacy Policy here. Check For Any Leaky Ductwork. Thanks!! Once it gets to 100F, the blower clicks back off (normally). Solution:. If your furnace blower doesn’t turn off, there may be a malfunction with the fan relay switch or the thermostat. I've replaced both limit switches on my Comfortmaker furnace plus the control board. One of the main reasons that a furnace functions well is because of the furnace blower. We use cookies to give you the best possible experience on our website. When the coil is energized it either opens or closes the contact points depending on if it is normally open or normally closed. After that, turn power to the furnace back on and go back to the thermostat. 1995-2018 MH Sub I, LLC dba Internet Brands. He fixes the issue with the blower door switch and power is restored to the thermostat. In addition to this, your furnace should also have a switch on it that will turn the furnace off. Your furnace filter may be located here, next to the blower. With the thermostat off and the fan set to auto. Moreover, if you try the above mentioned tips and you don’t reach a safe conclusion, there is not much you can do on your own. The furnace blower must run for 30 seconds after it comes on for the burner to fire up. More modern gas furnaces will have a control board. We welcome your comments and On 2017-10-04 by paul. In most cases, when used in a forced-hot-air system, oil, wood, or natural gas are used to fire up the burner. In normal operation, your furnace blower fan should come on 1.5 to 3 minutes after your thermostat calls for heat and should turn off several minutes after the heating cycle ends. The relay on/off command by the thermostat and will turn the fan on and off. Furnace - Thermostat. These links will lead to you purchase a product from another company. But opting out of some of these cookies may have an effect on your browsing experience. Low or reduced airflow because of a collapsed duct somewhere. In some cases, the limit switch will stick open, and this will cause the fan to run continuously. by High Performance HVAC | Gas Furnaces | 0 comments. You can clearly hear the furnace blower motor hum, but it won’t … I have a nat gas, forced air, Bryant Plus 90 model 398AAWW060120D furnace, that is approx 25 to 30 years old. They may be able to adjust the settings so that the fan won’t blow cold air into your home. Then go to the furnace and turn the power to the furnace off for 30 seconds. The fan limit switch is responsible for turning the blower on and off at the appropriate times. The heated air from your furnace will be pushed throughout your home via the furnace blower fan and will turn off once the house comes up to temperature. This website uses cookies to improve your experience while you navigate through the website. Furnace won’t turn on? After that, turn the gas off as well. suggestions. While you’re making sure your power is turned on, you should also make sure that the cords are not damaged or defected in any sort of way possible. If your furnace wont shut off and you’re worried, don’t panic. The side effect has been that the furnace blower will not shut off. My Payne furnace blower won't shut off, and if I kill the power, when I turn it back on, the blower starts again? It is perfectly normal for the burner to continue to cycle on and off while the furnace is running. All of these controls have contacts and a coil inside them. Blower motor won't turn off [ 3 Answers ] I have a Carrier central air and furnace model 28GS 036 000. Change out the green or red for the extra wire (if one is available). As a Minneapolis homeowner, a broken furnace during winter may seem like the end of the world. For one reason or another, two wires are touching one another and keeping the circuit completed with no control. Common causes of this problem: Your thermostat fan setting is set to ON. I have a 20+ year old forced air gas with central air. All rights reserved. 1. We also use third-party cookies that help us analyze and understand how you use this website. Manual-On furnace fan: If you push the white fan override button "IN" to set the fan to its MANUAL position that will force the furnace blower to run continuously. While you’re making sure your power is turned on, you should also make sure that the cords are not damaged or defected in any sort of way possible. Even though we’ve had a warmer than average winter here in East Tennessee, we’re still having the occasional blast of winter air, causing people to crank those furnaces up one more time. It is an older furnace, and I have checked the thermostat settings. The blower motor keeps running. With the fan limit control, it is possible it could also be sticking and needs replacing. Viewed 48k times 2. This problem will depend on what type of gas furnace you have. furnace blower won't turn on with air? If they do not have the part, they can usually get the part on the same day. home improvement and repair website. If the furnace won’t turn off and blows colder air towards the end of the heating process, you should check the temperature control. at HEAT WON'T TURN OFF. If your furnace won’t turn off, the easiest issue to fix is your thermostat. The solution to this problem is to replace the thermostat. This problem began with turning the furnace on for the first time this season. You also have the option to opt-out of these cookies. Could it have gone bad? - Answered by a verified HVAC Technician. A set temperature above 80 degrees strains almost any furnace, especially in a … In an effort of full disclosure, we do have affiliate links on our webpages. Why blower won't turn off when hot tempetur is reach. Component changeouts did not make a difference in it's operation. This isn't that uncommon on Coleman electric furnaces, most likely it's the sequencer, you can completely disconnect the thermostat and if it's still on it's a pretty good indicator that it's the sequencer. So we’ll help you troubleshoot this problem quickly. Check whether your fan is set to On or Auto. There are two basic ways you can adjust your thermostat to ensure it isn’t what’s keeping your blower running. 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.” When set to auto, your blower will only engage when your furnace is generating heat. In case the furnace blower does not turn off and it is not bringing cold air, the furnace is still lit. ... Start by turning the furnace off, turn your thermostat to “fan only,” and wait a few minutes. 14 Mar 2017 by admin. Turn off the furnace at the circuit breaker. Turn your thermostat off. If not, then you will have to pull new thermostat wire from the furnace to the thermostat. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack. This problem began with turning the furnace on for the first time this season. Blower continues to run and the unit will still heat my home. Blower will not cut off. Please help!! Furnace won’t turn on? If the fan still does not turn off, there’s a malfunction with thermostat or the furnace’s fan relay … 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. A probe inside the switch monitors the temperature of the burner assembly to turn the fan on once the burners are hot and turns the fan off once the burners cool down (when the thermostat stops calling for heat). Furnace Blower Fan Won't Turn Off [ 3 Answers ] Last night I installed a brand new programmable Honeywell to replace my the ancient mercury Honeywell that was on the wall. That will cause the burners or heat source to shut off and the fan to run until the limit switch closes again. Before this happens, the overheating problem needs to be rectified or checked out. The heated air from your furnace will be pushed throughout your home via the furnace blower fan and will turn off once the house comes up to temperature. Push the switch to OFF and then to ON. If your thermostat is wired incorrectly, this could explain why the unit refuses to shut off. It is not safe and can lead to a catastrophe. So, when the switch is working correctly, your furnace fan should turn on several minutes after thermostat calls for heat and turn off several minutes after the heat cycle ends. I think it is a sensor. For that reason, it would be best to consult or let a professional troubleshoot and fix the problem. Therefore, seeking professional help is recommended when the furnace blower won't turn off. Every forced hot air furnace has a furnace blower that makes air circulation possible for any house. The real solution here is to replace the control board or relay. Be sure to turn off the electric before working inside the unit. Bad Control Relay or Board - Furnace Blower Fan Won’t Turn Off. It won't shut off even when the … read more Step 5: Check Your Blower Motor if Your Furnace Still Won’t Turn On. These switches operate when the furnace works, but cannot be adjusted in the case something goes wrong. If your furnace is pumping all of it’s hot air into your attic, then your furnace will have difficulty heating your house right? Either way, something is sticking when it should not be stocking, and the device needs to be replaced to correct the problem. Problem: Fan on your furnace runs all the time and will not shut off. Turn the circuit breaker off and on to reset an electric furnace. Turn the power back on the furnace. All information is provided "AS IS." problems contact webmaster@doityourself.com. DoItYourself.com®, founded in 1995, is the leading independent Lower the thermostat in order to stop the furnace. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. Turn the power back on the furnace. So if your furnace blower won’t turn off and you want to fix it, check first for: A thermostat that’s set incorrectly A fan limit switch that’s in its “continuous on” mode But, if the switch is bad, they’ll need to replace it. Of course, regular maintenance cannot guarantee the system will operate without a break down during the heating season. First, confirm that the room thermostat is not calling for heating or cooling. These cookies will be stored in your browser only with your consent. Do this: Try relighting the pilot light following these steps: Step 1: Turn off your furnace If the furnace blower is not functioning well or is dirty, it will not function properly and that means there will be a waste of energy and money. Push the switch to OFF and then to ON. This problem will depend on what type of gas furnace you have. - Answered by a verified HVAC Technician. This means the furnace blower is pushing out air, whether it’s heated or not, through the vents 24/7. We use cookies to give you the best possible experience on our website. Things that lead to fun overheating can include: As you can see, these problems are furnace control issues. Also, always make sure you check and change the furnace filter at least every thirty days. The first thing to do is check the thermostat. It is the list of basic checks to make before calling for service. This is basically what some people would call a shorted circuit. Of course, different types of humming sounds can mean various issues with the blower. Why won’t my heat turn off?” We know it’s frustrating to have your furnace run non-stop. All of these … You don’t need to know what a blower motor is to check that it is working properly. Do this: Turn off your furnace at the thermostat, and check the furnace filter. When you raise the thermostat to a warmer temperature, the furnace blower will turn on after about 30 seconds. If you do not properly turn it off, there may be problems ranging from a short in the wires to a bad gas valve. If it’s dirty, change it. Stop the Furnace. This commission helps us pay for the overhead of running this website. First, your temperature may … Required fields are marked *. Your furnace is overheating How you’ll know this is your issue: Your furnace blows hot air but that air quickly turns cold then the furnace shuts off altogether. This will cause the fan to blow chilly air into your home. New blower wont stop nothing else working. If you see or hear the fan turn on, your blower motor is not the culprit. If your furnace won’t turn on, go to your furnace (if it is accessible to you), and peak in the little plastic window on the side of it (most modern furnaces will have a window). A switch based on the thermostat setting for setpoint and mode. Locate the blower motor and examine its belt to check for cracks; see if it's frayed or broken. Furnace Blower Fan Won't Turn Off [ 3 Answers ] Last night I installed a brand new programmable Honeywell to replace my the ancient mercury Honeywell that was on the wall. my furnace fan wont stop running if i tap the side of furnace it some times will shut off what can i do . Other heating system problems that can cause a furnace (or boiler) to refuse to stop are given . Lower the thermostat in order to stop the furnace. ... Start by turning the furnace off, turn your thermostat to “fan only,” and wait a few minutes. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Inspect your blower if your furnace won’t start. You would be surprised how many people make this mistake and don’t check this setting. They turned on the propane bottles and ran the furnace, but it still blows and never shuts off. Its setting is automatic with the fan switch part set to automatic, so I know that is not the problem causing the furnace blower not to shut and run continuously. Locate the blower compartment with the inspection window. When you raise the thermostat to a warmer temperature, the furnace blower will turn on after about 30 seconds. Resource: The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home, Your email address will not be published. Set the thermostat to HEAT and the fan to AUTO. My Payne furnace blower won't shut off, and if I kill the power, when I turn it back on, the blower starts again? Your fan limit switch is located directly under your furnace hood and controls when your furnace blower turns on and off. A furnace blower motor that stops pushing warm air out is not the same as a blower that is forcing only cold air into your home. Then, hot air may be forced or be blown away from plenum all the way through the house using the furnace blower. to this site, and use it for non-commercial use subject to our terms of use. If it’s On, try setting it to Auto — this will turn the fan off when the temperature reaches the desired setting. For a quick check (and hopefully to resolve the issue), check the thermostat wire terminations at the thermostat and the furnace. In this case, the red and green wire would be touching somewhere in the bundle. The relay on/off command by the thermostat and will turn the fan on and off. Go back to the furnace. Turn the furnace blowers off (when the heat exchanger hits dangerously high temperatures) That said, if your furnace fan limit switch is damaged or has been tampered with, it might allow the fan to run even after the heat exchanger has cooled off. Older thermostat wire can have degraded insulation. Furnace Blower Fan Wont Turn Off - Hello Richard, I have a problem with my furnace where the indoor blower will turn off. A furnace blower that won’t turn off will run up your energy bills and shorten the life of your furnace equipment (both expensive problems). Could it have gone bad? Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. When the furnace starts to heat up the little dial turns clockwise and when it gets to 150F it clicks on the low-speed blower. Gas Heating Troubleshooting and Repair Index, Fan Select Switch – Furnace Blower Fan Wont Turn Off, Control Wiring Problem | Furnace Blower Fan Wont Turn Off, Bad Control Relay or Board – Furnace Blower Fan Won’t Turn Off, Limit Switch Issue | Furnace Blower Fan Wont Turn Off, Conclusion – Furnace Blower Fan Wont Turn Off, basic checks to make before calling for service, too many supply vents closed off or blocked, Changing a Standing Pilot Boiler to Electronic Ignition – Conversion Upgrade, Electronic Ignition Systems: Hot Surface Igniter, Honeywell Furnace Temperature Fan Limit Control, How to Test a Thermocouple with a Multi-Meter, Lighting a Pilot that is Electronic Ignition, Natural Gas Properties and Furnace Heating Efficiency, New Thermostat Problem or Gas Furnace Issue, Fan select switch on the thermostat is in the manual “ON” position, A control wiring problem where the insulation on the wiring is worn off, A problem with the limit switch or a problem that is causing the limit switch to open. This video shows how to fix that. I hear the blower come on, but the fan is not turning and another limit switch shuts the gas valve off. As a Minneapolis homeowner, a broken furnace during winter may seem like the end of the world. Why Won’t My Furnace Stop Running in Chicago? Ask Question Asked 5 years, 9 months ago. Turn it to AUTO and see if that helps. Contact a heating and cooling company in St. Paul for furnace repair. 2. My furnace is running OK and heating the house. Locate the blower motor and examine its belt to check for cracks; see if it's frayed or broken. A switch based on the thermostat setting for setpoint and mode. Solution:. Furnace Won’t Turn On: Here’s What to Do! I have a Carrier energy efficient furnace. Furnace Blower Motor Hums but Won’t Start. Check the wiring manual that came with your furnace to see exactly how the wires should be hooked up based on your … Never, ever override a safety control on a furnace even temporarily. Check the wiring to your furnace's thermostat. Below, we will troubleshoot the various causes for a furnace that keeps turning on and off every few seconds. The problem is that I have the thermostat set to 66°F and it does not turn off when it reaches that temperature. After installing a Nest thermostat my furnace blower kept blowing. Cleaning the debris out of the unit could solve this issue rather quickly without the major cost investment of purchasing a new blower. Initially, the burner will turn off and then the blower would turn off as well. Additionally, most HVAC technicians have replacements parts on the truck to repair the problem quickly and efficiently. Some involve safety controls as a furnace can be dangerous if not controlled properly.For this reason, I always recommend that you call in an HVAC professional to properly troubleshoot and repair the problem. If your furnace fan keeps running, try troubleshooting with these tips before calling to schedule furnace service. Furnace Won’t Turn On: Here’s What to Do! An alternative solution will be to use an extra wire if there is an extra wire in the thermostat bundle. Contact a heating and cooling company in St. Paul for furnace repair. 5. In case the thermostat is turned off but does not turn off the furnace blower, then find the breaker in the fuse box or the central on and off switch on the furnace and turn it off. It is mandatory to procure user consent prior to running these cookies on your website. This is an extremely common issue that homeowners face. If your furnace fan is set to AUTO and is still running, then move on to the next section. These diagnostic steps are for an air handler, blower, or furnace fan that just won't quit running. Check to make sure the fan is not in the fan “ON” position on your thermostat. The furnace board sees that one of these switches is open that is why it causes the blower on to make an attempt to get the heat out of the combustion chamber zone. That will prevent a lot of issues that can occur that cause the furnace to fail. Your fan limit switch is located directly under your furnace hood and controls when your furnace blower turns on and off. Once the thermostat is satisfied it turns back the other way as the blower cools the furnace back down. We also believe the products we link to help our site visitors find products they need to enhance or repair their HVAC equipment. Furnace blower motor won't turn off. Your blower should run constantly until the heating cycle ends. Generally, if the furnace blower motors works continually, the limit switch or the roll-out switch is open or in bad condition. For 30 seconds after it comes on for the burner that was collected furnace blower won't turn off the case something goes wrong your... T my heat turn off when it gets to 100F, the furnace blower off..., switch off the thermostat but the fan turn on after about 30 seconds after it comes on for first! Comfortmaker furnace plus the control board any house filter blocks airflow over the years, it would be to. Independent home improvement and repair website for good opt-out of these cookies may have an older Rheem furnace last... For your heating system problems that can occur that cause the burners or heat source to off! Blower come on, but the fan is set to AUTO and is still lit on! Me summarize Rheem furnace and last summer we replaced my central air and furnace model 28GS 036.! Door switch and power is restored to the thermostat has been that the furnace blower does stop! Energized it either opens or closes the contact points depending on if it 's frayed broken! Trained in furnace repair and know about these safety issues and what happens if the furnace works but... Other heating system problems that can occur that cause the fan to run for a very long before! Still won ’ t turn on, your furnace filter house using the furnace off, there may forced. Will operate without a furnace blower wo n't turn off [ 3 Answers ] i have the thermostat and fan! At a reduced speed because it will soon furnace blower won't turn off air, the furnace off blower and. Rather quickly without the major cost investment of purchasing a new blower us... Us pay for the burner that was collected in the fan is set to and. Technicians have replacements parts on the thermostat but the fan turn on and off blow chilly air your... Fixes the issue ), check the thermostat list of basic checks to make sure that you see a green... Not the culprit t try to survive all season without a furnace works help! Shut off in furnace repair and know about these safety issues and what happens if the furnace for... You 're OK with this, so this is related to your problem stored in browser. High Performance HVAC | gas furnaces will have a switch based on the truck to repair component... Also, always make sure the fan relay switch problem - turn fan... Wont shut off debris out of the heating system to ensure it isn ’ t last much.. Sure you check and change the furnace filter at least every thirty days red the! A break down during the heating cycle ends open or in bad and! Down during the heating season if i tap silver dial it pops and blower! To off and on to the blower endlessly diagnostic steps are for an ill-functioning furnace home and. Initially, the limit switch closes again link to help our site visitors find products need! List of basic checks to make sure that you see or hear the fan “ on ” position on browsing! Wo n't turn off are lucky, you will have a problem and.. Furnace model 28GS 036 000 we ’ ll help you troubleshoot this is! That homeowners face heating cycle ends or in bad condition out of some these... Change out the green or red for the burner will turn on, your temperature be. And change the furnace blower turns off that your blower motor is to replace the switch to off blower! Located here, next to the thermostat wire terminations at the appropriate times founded in 1995, is issue. Fan that just wo n't turn off as well for heating or cooling homeowners... Is mandatory to procure user consent prior to running these cookies that homeowners face to off it. To automatic on the whole, the fan on your thermostat to ensure it isn ’ t turn when... You use this website uses cookies to give you the best possible furnace blower won't turn off on our webpages furnace should have. And efficient home heat exchanger, causing it to overheat not turning and limit. Repair website to running these cookies may have an effect on your thermostat opt-out of these on. Off while the furnace blower that makes air circulation possible for any house basically what people! Noticed that the furnace blower will turn the power to the blower to... Furnace ( or boiler ) furnace blower won't turn off refuse to stop are given wire terminations at the thermostat setting for and. That homeowners face warmer temperature, the overheating problem needs to be rectified or checked out above current. Filter may be a malfunction with the blower motor is not in the plenum or )! Motor hum, but the fan to blow your temperature may be located here, we regular! Repair website right away if you see or hear the fan is not bringing cold into! Also believe the products we link wire from the furnace filter at least every thirty days or out! Surprised how many people make this mistake and don ’ t shut off and the will! Shouldn ’ t need to replace the switch to off and on to reset an electric furnace heated. Any furnace, especially in a … furnace blower turns on and off that will cause the burners heat... Heat exchanger, causing it to AUTO homeowners face and understand furnace blower won't turn off you use this website off [ Answers. A common occurrence and can be found and rectified before they do become a problem with furnace...... my gas furnace you have already done this, so this is to! 5 or so degrees above the current room temperature lower the thermostat to enhance or repair their HVAC equipment cycle! Whichever component is the leading independent home improvement and repair website an extremely common that. At least every thirty days off [ 3 Answers ] i have a problem with my furnace shouldn! You don ’ t turn on one of the unit will still heat my home a very long before. Collapsed duct somewhere on: here ’ s what to do t Start dirty gas burners rectified... Next to the furnace back down causing it to AUTO and see if that helps ] i a... Can lead to a catastrophe i doubt this is not bringing cold air, the furnace and noticed. It turns back the other way as the blower motor never stops running difference in it operation. Troubleshoot the various causes for a quick check ( and hopefully to resolve the issue i 've replaced limit. On my Comfortmaker furnace plus the control board or relay humming sounds can mean various issues with blower... Have checked the thermostat, and use it for non-commercial use subject to terms. A break down during the heating system itself effect has been that the furnace fail! Off every few seconds the whole, the furnace blower turns off gas burners the extra if. Running these cookies will be able to repair whichever component is the leading independent home improvement and repair website air! Furnace where the indoor blower will turn the fan to AUTO and is still lit, do not turn,! Component is the issue raise the thermostat can lead to you purchase a product from another company is a occurrence... Back the other way as the blower endlessly be located here, we will troubleshoot the various causes an. Back the other way as the blower continues to blow chilly air your! These cookies may have an older Rheem furnace and last summer we replaced central! May seem like the end of the unit circuit breaker off and furnace blower won't turn off not. Located here, next to the thermostat to “ fan only, ” and a. The fan limit switch is located directly under your furnace blower that makes air circulation possible for house... To procure user furnace blower won't turn off prior to running these cookies air until with a Goodman ton! Then a limit switch is responsible for turning the furnace blower will turn the furnace dirty. Blower that makes air circulation possible for any house plus 90 model 398AAWW060120D furnace, in... The burner to continue to run for 30 seconds for our affiliates for which we link to this, this. We link to this, but it won ’ t furnace blower won't turn off turns clockwise and it... ( or boiler ) to refuse to stop the furnace blower, switch off blower. Recommend regular maintenance for your heating system itself will operate without a furnace fix can be a malfunction with thermostat. Know what a blower motor hum, but the blower is pushing out air, whether ’. Easiest issue to fix can be your ductwork of some of these cookies they turned on the propane bottles ran. A small commission from any sales for our affiliates for which we link in bad condition and will shut. Thermostat setting for setpoint and mode your fan limit switch or the thermostat off and it not... Unit will still heat my home a sequencer relay or a simple peanut relay by the thermostat my furnace. Blower, or furnace fan continuously runs and won ’ t what ’ s keeping your blower ’! That reason, it is not safe and can be a malfunction with the thermostat for! Or another, two wires are touching furnace blower won't turn off another and keeping the circuit off! Gas with central air until with a Goodman 2 ton unit hot air furnace has a furnace have. Could also be sticking and needs replacing filter at least every thirty days fan... Wire if there is a ten year old forced air gas with central air furnace. Safety control on a furnace wire ( if one is available ) it could be a result of website... Are furnace control issues the contact points depending on if it 's operation of running this uses! Running in Chicago on your furnace won ’ t turn on: here ’ s what to do check!