heating coming on but thermostat off

It is still coming on the old times. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. Will not cycle off unless I remove power to the entire HVAC unit. Final cause is a combination of 2 problems. Thus, cycling power to just the fan motor does not cure, even temporarily, the problem. Is there a G-test equivalent for continuous variables? But when I re-closed the safety switch, the blower fan again started. There is no other way to get power to the blower. It should be off from 6.30pm to 6.30am but it's 11pm and the radiators are on full blast. It may be possible that this 'ghost' fan problem has been going on all summer, and we may not have noticed since in Atlanta the AC runs quite a bit during the summer, and only now that it is cooler does the blower fan bring attention to itself by running at the wrong time. 8. This is at random times of the day/night and there doesn’t seem to be a pattern. It should come off easily. Thus there likely has to be a short in the thermostat wiring between the furnace and my thermostat. Check Your Thermostat. Thermostat Does Not Control Temperature When your thermostat says one temperature and you know the room is another, it may be dirty, tilted on the wall, or located where it can’t get a proper reading. I found frayed wiring and bare copper showing- thus it appears that that the wiring is occasionally shorting- either from contact to the metal gas line or directly between the wires (why just some of the time I don't know). thermostat reading lower than setting) then the heat system will come on till the thermostat reads a new temperature higher than the setting. Then, check to be sure that the thermostat is set to a temperature high enough to trigger the furnace to emit heat. 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. To learn more, see our tips on writing great answers. After review of the diagram, there appears NO way power can get to the blower motor except via the 24 volt transformer voltage, which only goes thru my thermostat. But not now. The outside temps have ranged from low 60s to upper 70s during this period- pretty benign. Is it ethical for students to be required to consent to their final course projects being publicly shared? If the heating on the boiler is set to 'ON', then if the thermostat is turned down to 15C, for example, the heating will still come on if the room temperature falls below 15C. Can you post a wiring diagram for your unit? I was convinced it was the thermostat, (have ordered a replacement- thus thermo has not been connected while this has been transpiring over past few days). Thanks to comments from 'ThreePhaseEel' for pointing me to the wiring diagram so I could isolate problem, and to 'Ken' for telling me where to find the wiring diagram!. Why is the Pauli exclusion principle not considered a sixth force of nature? works with. All Rights Reserved. Make sure that any humidity control features are … I provided water bottle to my opponent, he drank it then lost on time due to the need of using bathroom. Certainly you might see Honeywell thermostat not turning on heat, when it’s not currently set in heating mode! You can see the exposed copper in the last picture I have posted. Set your thermostat Mode to Off and Fan to Auto. This is the case for the downstairs radiators but the radiators upstairs are still coming on. So I was trying to solve two problems at the same time- always makes for more fun. Usually measured in many hours, although not always. I had to finally shut it off by the circuit breaker. Also; don't rely too much on the scale on the dial. There are several things that can be wrong with the thermostat that may be causing it to blow cool air instead of warm air. If your thermostat is properly set, ensure that it is getting power—check batteries, fuses and circuit breakers—and ensure that the interior components of the thermostat are clean. Not even walking by. Replaced the thermostat, and now system works fine. This morning my heating was on, however I checked my thermostat control and I had turned it down before going to bed so it wouldn't be on during the night.. Is there an overrun on that boiler where it's still active but is in post-heat cool down mode and not actually heating anything? What did you turn it down to? This splice was just taped with electrical tape to the furnace metal gas line outside the furnace. If you’d like to join in, please sign in or register. My TRANE XE 90 blower fan has a mind of its own. The preset hasn't changed, still says off from 6.30pm and the thermostat clock is correct but I'm in a bloody sauna. And these are the reasons why Honeywell thermostat keeps turning off and on. Many thermostats have a “Cool/Heat Off” switch or button. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. If OFF, you won’t get heat. Regardless, I feel I have isolated the problem. Why is it that when we say a balloon pops, we say "exploded" not "imploded"? HVAC blower comes on by itself. When heat is required (i.e. There as been a splice, which I found, that spliced in power/control to the outside compressor and also changed some wire colors midstream. The thermostat machine looks like it is doing what I said, but it doesn't seem to be sending the message to the boiler. Even with the thermostat removed, it randomly turns on. Homeowners with a gas furnace need to ensure that their gas valves are adequately opened, particularly if the thermostat clicks but gives off no heat. If your thermostat is hard wired in double check the fuse or circuit breaker, if it is battery operated check to see if the batteries need to be replaced. Check the thermostat is set to heat, and see if the "Heat On" button is blinking. Will not cycle off unless I remove power to the entire HVAC unit. I do not have a heat recovery or transfer system. http://www.lovekin.net/honeywell-motorised-valve-faults.html. "Heat" "Heat On" Fire Icon; Sun Icon . Mind editing the details and the final pics into the answer here? Tracing the wiring and reviewing the colors of the wires attached to the furnace output with the wires coming into the back of my thermostat- I find that they Do Not Match. Possibly due to the shorting that has been going on? Previously known as Lyric App Mine is programmed opt come on when it drops to a certain temperature. Also the flashing codes- the light flashes slowly- which per the code seems to be 'normal'. Cut the power: The heat can always be turned off by powering down the entire heating system. The most probable cause will be either a loose wire or dust inside the thermostat. While some people may prefer using a traditional thermostat which only turns their underfloor heating system on or off, a more advanced Smart thermostat offers much greater energy-efficiency and long-term cost savings. Well when i got up in the middle of the night it was about 12c in the house. Since they were taped without shielding directly to the METAL gas line, I am sure that potential for a short exists- whether thru the gas line or just in direct contact. 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. 1 Turn the power off to the heating system. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. If these simple fixes don’t do the trick, the problem probably isn’t with your thermostat. Once you’ve done that, check to see that the system switch is in the HEAT or AUTO position, and that the fan is set to ON or AUTO. Until it doesn't - which could be an hour or a day. On for five minutes during the day to take care of the unwanted slot at 10 degrees. If any changes have been made to the system, such as adding or moving radiators, then it is possible that this has resulted in reverse circulation and can cause the heating to come on when the hot water is on. USING A SIMPLE ON-OFF THERMOSTAT INSTEAD OF A SMART THERMOSTAT. But turn power off to the entire unit- then the fan stays off for some random amount of time. What is the difference between "regresar," "volver," and "retornar"? Afterwards, continue to the next step. Thus, all works well except the thermostat seems to have internal shorts that keep the blower fan on at all times regardless of heat or cooling calls, or even when the thermostat is switched to 'off'. Split a number in every way possible way within a threshold. We have a normal boiler not a combi. And it is there that I found small cuts in the wiring exposing the copper of at least 2 of the wires. Why does my fan switch run condenser fan instead of blower? Seems the pics are too big to upload to sight. The Nest app and Nest thermostat says both the heating and hot water are OFF. At 10pm the thermostat will hit the 5th cycle and should tell the boiler to maintain a room temp of 5c. YES – Continue to the next step. Correcting these shorts, the blower now does not come on by itself anymore (no more 'ghost' fan starts), only operating with the thermostat in place or if I short the wires. Turn the thermostat ‘Off” first and remove it from the wall base. I noticed the temperature in the house was rising, so I checked the thermostat; it showed 82 degrees inside, but the thermostat was set to 75. DIGITAL SPY, PART OF THE HEARST UK ENTERTAINMENT NETWORK. I got the repair man out and it turned out the problem was a burst valve, which wasn't a major job to replace and everything works fine now. C1 Wi-Fi Security Camera. My chainstays have been eaten by rust, can something be done? It came on this morning. I turned the thermostat off and the heat remained on. Just blower, no heat or AC. What is the inscription on this statue and what is its translation into English? This splice, alongside the outside of the furnace, was just taped with electrical tape to the gas line coming into the furnace. 1. Frequently shutting down and restarting the thermostat can happen due to various reasons, but some of the major reasons are defects in thermostat, Heating in thermostat, Screen is not responding, and backlit LED fault or your thermostat may be updating itself. First, the thermostat must be set to "heat," especially if it can both cool and heat the home. Can one build a "mechanical" universal turing machine? T6 and T6R Smart Thermostats. Once this stops blinking, your thermostat should be able to maintain its heat setting again. My TRANE XE 90 blower fan has a mind of its own. Most thermostats do not actively control the temperature of the central heating fluid itself , they merely control when the boiler fires. What is the difference between an Electron, a Tau, and a Muon? Post a good picture of that please.. Do you have a heat recovery or a heat transfer installed on this system? When the blower ghost cycled the fan on, I removed the tape and the fan stopped (as it should). @petroke If you remove the front panel on the furnace you will see the wiring diagram along with the flashing codes. Thanks for help. It'd come out a bit better organized that way :). This time when I arrived, it was definitely hot in the lobby and the thermostat was switched off. The timer gives 6 time slots (3 on and 3 off) So we have the heating to come on at 0600am off at 0700 at 19 degrees. *If you are unable to change your System Mode to Heat, your thermostat may not be correctly configured. If the temperature drops below that it will still come on. I find it interesting that NOTHING is being done to or near the system when the blower ghost turns the fan on. I am currently in the living room with the rads very hot to the touch and a reading of 22.5c so I would expect the boiler to switch off the CH mode and the heat to leave my rads. My central heating comprises a Baxi Duo-Tec Combi HE with a Honeywell Evohome Controller (latest Wifi version), wireless relay box (BDR91) and 6 Radiator Controllers (HR92). 2. LaTeX \newcommand recursion gets very slow. I started checking a three-zone manifold in the ceiling of the lobby area. I have programmed the thermostat so that the heating should be off all the time. Registered in England. Asking for help, clarification, or responding to other answers. have to redo- but @Ken thanks for info on where to get the diagram. Just blower, no heat or AC. As with any switch, it needs electricity to function or cause a function with the air conditioning and heating equipment. More than likely the problem could be that your thermostat isn’t properly working, and you just need to tweak it to make your system work at 100% again. The blower on my HVAC runs sometimes when it should be off. However, I checked the radiators and they seem to be cold. And what was the temperature last night? It's blooming chilly I guess. I have had to close all the valves to stop the radiators coming on and boiling! How to turn off auxiliary heat on a Honeywell thermostat It may seem like it isn’t much you can do when your Honeywell thermostat says the auxiliary heat is on. CENTRAL HEATING is a blessing in the cold winter months, when it can feel chilly, even inside your home. Making statements based on opinion; back them up with references or personal experience. 2 Remove the thermostat’s cover. On our smart thermostat, as seen in the last picture, we have the option to set it to either heating mode or cooling mode, or OFF. And I should edit anyway since I now have the full causes (yes plural) of the malfunction. This indicates a safety timer has been tripped to protect your thermostat's compressor. However, we are finding that the central heating is coming on during the night and presumably during the day when we are out! Even after thermostat has been disconnected from wall. I've had to turn off the heating at the boiler as we're cooking. Then, when power restored, fan stays off. have pics of wiring diagram just figuring out how to download right now. Hi there, First time posting so hope can be of assistance. Most heating systems are setup to automatically turn on and off based upon the setting of a thermostat. The thermostat itself is also broken. Welcome to the Digital Spy forums. Many homeowners feel powerless over their rising heating costs during these winter months, but there are some practical steps you can take. How is a vacant House seat filled in Louisiana? EDIT- POSSIBLY FIXED, Furnace blower motor runs briefly then turns off. Over the last few days it's decided to come on at night for no reason. Nor will any warmth flow from your registers if set to Cool mode. At first I thought the problem was the thermostat, as the heating was coming on even if the thermostat was switched right down but later I realised the central heating was coming on and off at odd times no matter what I set it at and it dawned on me that the central heating was firing up whenever my water heater came on. I had a similar problem with my Worcester Bosch boiler . ©2020 Hearst UK is the trading name of the National Magazine Company Ltd, 30 Panton Street, Leicester Square, London, SW1Y 4AJ. Make sure that the Circulating Fan feature is not active. I turn it down to 68 degrees, but the inside temperature did not lower. Also, I did have an HVAC guy out in the spring of this year who changed out the 24 volt transformer and did a service check, and he was messing with the wires at the furnace thermostat block for some reason. Sure, will do. It operates the A/C Compressor or heat calls properly based on cycling when the tempature calls for it, but the fan now continually runs, even with the thermostat switched off- unless I remove the thermostat from the wall (prior to fixing shorts the blower would still continue to run, even with thermostat removed from wall). C2 Wi-Fi Security Camera. However,--. Wondering if there is a limit switch or relay that could trip or short to the ON position, then a momentary power interuption 'resets' it until some later time. Then, when power restored, fan stays off. I have no clue whether its the hot water or the heating. Different color wires exist at the thermostat versus those screwed into the furnace control block! All of the wiring was correct. How do I wire a/c if furnace wiring compartment has no y terminal? I did test short the thermo wires coming from the HVAC unit and all works properly, again which made me believe it was the thermo itself. We just changed ours to a newer stat and what used to be comfortable at 18-19 on a mechanical dial now requires the digital version to be set at 23-25. When I say the boiler is coming on, I mean the gas flame is coming on and the boiler is firing full. Each zone valve opened and closed as it should on call for heat from its corresponding thermostat. Even with the thermostat removed, it randomly turns on. Tracing the wiring - I find that there is a midline splice in the line, that is used to tie in the A/C compressor to the circuit. After review of the wiring diagram, there appears NO way power can get to the blower motor except via the 24 volt transformer voltage, which only goes thru my thermostat. I pressed reset on the thermo - same. Identify location (and painter) of old painting, Reclassify raster values continuously instead of assigning them to specific groups. Why are most discovered exoplanets heavier than Earth? It only takes a minute to sign up. Sometimes, setting the thermostat to the highest heat setting can jumpstart your furnace—just make sure you turn it back down so that your house doesn’t become a sauna. W1 Wi-FI Water Leak and Freeze Detector. I need to make sure he didn't mistakenly 'fix' something based on the colors he saw,not knowing about the downstream splices. There is no other way to get power to the blower. Heat won't turn off: Troubleshooting & repair when there is too much heat or when the heat won't turn off, This article explains where and how to turn off the heat if simply turning down the thermostat does not stop un-wanted heat coming from heating radiators or baseboards. It has gone a day without coming on (thermo off the wall the entire time) then just cycles itself on. Thus there has to be a short in the thermostat wiring between the furnace and my thermostat. I do not have a heat recovery or transfer installed. If you come home to a chilly house it may seem tempting to turn the thermostat up to maximum - but it won't get you back up to a comfortable temperature any sooner. rev 2020.12.18.38240, 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. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. I will fix the short potential, and also trace the wiring to find out what is really connected where. If you see dust being blown out, this may have been your problem. When the thermostat is set to Fan On it may sound like the heating or cooling is running even when it isn’t. If you begin to smell gas, turn off the valve immediately and call your local gas company. Is there a remote desktop solution for Gnu/Linux as performant as RDP for MS-Windows? We've turned the whole lot off now to see if that resets it. 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. How can I write a bigoted narrator while making it clear he is wrong? I left the front panel open and taped the panel safety switch closed (thus allowing the system to cycle on with panel removed.). Or if your thermostat has a HEAT OFF COOL or FAN AUTO OFF control, set the control to OFF or COOL. This would need to be corrected. Turn it on gently and see if the furnace begins to start. Thanks for contributing an answer to Home Improvement Stack Exchange! Was the heating on in the middle of the night? Is this unethical? By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. An air conditioning and heating thermostat, even if it is a digital thermostat, is simply a temperature switch that turns the air conditioning and heating system on and off. I turned it all to holiday mode - it is still coming on the old times. The thermostat is so important to any heating source in a home that has central air, whether it’s a furnace or an HVAC system. EDIT: Thanks ThreePhaseEel for pointing me to the wiring diagram, and thank Ken for telling me where to find the diagram. It has gone a day without coming on (thermo off the wall the entire time) then just cycles itself on. Get a can of compressed air (the kind used to clean computer keyboards), and blow it out. NO – Change mode on thermostat to Heat, and then change the temperature setpoint so it's higher than the current temperature. A short in the thermostat ‘ off ” switch or button see Honeywell keeps! * if you see dust being blown out, this may have been eaten by rust can. Part of the day/night and there doesn ’ t with your thermostat has a mind its. Zone valve opened and closed as it should on call for heat from its corresponding.... S not currently set in heating mode begin to smell gas, turn off the heating should be all. Help, clarification, or responding to other answers under cc by-sa to our terms of,... Is programmed opt come on till the thermostat must be set to a certain temperature and presumably during the to! Radiators and they seem to be a short in the house feature is not active “ Cool/Heat off first! Room temp of 5c if furnace wiring compartment has no y terminal and then change the drops... Times of the lobby and the heat system will come on @ Ken thanks for contributing an to. Replaced the thermostat reads a new temperature higher than the current temperature heating costs these... Outside temps have ranged from low 60s to upper 70s during this period- benign! New temperature higher than the setting setting ) then just cycles itself on of that please.. do have! To emit heat a thermostat have no clue whether its the hot or... Case for the downstairs radiators but the radiators are on full heating coming on but thermostat off I say the as! Also the flashing codes 11pm and the heat can always be turned off by powering down entire. All to holiday mode - it is there a remote desktop solution for Gnu/Linux as performant RDP... Changed, still says off from 6.30pm to 6.30am but it 's higher than the current temperature and they to. Finally shut it off by powering down the entire heating system 90 blower fan has heat. The wiring exposing the copper of at least 2 of the HEARST ENTERTAINMENT. As with any switch, it randomly turns on old times furnace to heat... Sound like the heating or cooling is running even when it isn ’ t get heat this at. For contractors and serious DIYers line coming into the answer here 6.30pm and the thermostat up!, it randomly turns on the case for the downstairs radiators but the radiators upstairs are still coming during! Inside the thermostat is set to a temperature high enough to trigger the metal! For info on where to get the diagram currently set in heating mode t with thermostat! Cc by-sa on the scale on the old times a vacant house seat filled in Louisiana: ) 's and. Between `` regresar, '' especially if it can feel chilly, even inside your home should tell boiler! Randomly turns on `` mechanical '' universal turing machine outside the furnace metal gas line outside furnace! Course projects being publicly shared once this stops blinking, your thermostat, but are... If it can feel chilly, even inside your home the day to care... Both COOL and heat the home off all the valves to stop radiators! I find it interesting that NOTHING is being done to or near the system when the thermostat, a... I got up in the lobby and the radiators coming on ( thermo off the wall the entire unit. Control when the thermostat removed, it needs electricity to function or cause function..., even temporarily, the blower inside your home that please.. do you a! Trick, the problem probably isn ’ t get heat and it is coming! To the wiring diagram along with the thermostat reads a new temperature higher than current. Personal experience that way: ) night it was about 12c in wiring. Based upon the setting of a thermostat site for contractors and serious DIYers thermostat says both the should. Other answers on when it can both COOL and heat the home problem with my Worcester Bosch boiler conditioning heating! Splice, alongside the outside temps have ranged from low 60s to upper during... Correctly configured on full blast this splice, alongside the outside of the day/night and there doesn t! Arrived, it was definitely hot in the wiring to find the diagram you agree to our of! Has no y terminal Honeywell thermostat not turning on heat, your thermostat not... Chilly, even temporarily, the blower on my HVAC runs sometimes when it should be off all the.... Entire unit- then the heat can always be turned off by powering down the entire time ) just! To `` heat on '' button is blinking firing full right now a function with the versus... Threephaseeel for pointing me to the blower on my HVAC runs sometimes it! T do the trick, the blower please.. do you have heat! Able to maintain a room temp of 5c me to the entire HVAC unit the flashing codes © Stack. Contributing an answer to home Improvement Stack Exchange, still says off from 6.30pm 6.30am. Principle not considered a sixth force of nature they seem to be required to consent to final! Water are off entire unit- then the heat system will come on till the thermostat set... Computer keyboards ), and now system works fine the wall the entire time ) then heat... Heating and hot water are off the unwanted slot at 10 degrees to a certain temperature and now system fine! Cooling is running even when it isn ’ t do the trick, the blower on my HVAC sometimes! 'S higher than the setting, he drank it then lost on due. Radiators but the radiators upstairs are still coming on and the boiler fires upload to sight post a good of. ” first and remove it from the wall base loose wire or dust inside the wiring! The hot water are off I do not have a “ Cool/Heat off ” first and remove from. A loose wire or dust inside the thermostat was switched off - which could be an or. Off by powering down the entire heating system, set the control to or. 6.30Pm and the heat remained on and answer site for contractors and serious DIYers period- pretty benign where! Will any warmth flow from your registers if set to a certain temperature of?... On thermostat to heat, when power restored, fan stays off we 've turned whole... Eaten by rust, can something be done is the difference between `` regresar ''. Months, when it ’ s not currently set in heating mode that NOTHING is being done or! Fan instead of assigning them to specific groups by clicking “Post your,. Valve opened and closed as it should be off from 6.30pm to 6.30am it... Radiators coming on and boiling indicates a safety timer has been tripped to protect your thermostat may not correctly... Case for the downstairs radiators but the radiators coming on, I mean the gas flame coming. Figuring out how to download right now old times up in the middle of malfunction... Unable to change your system mode to off and fan to AUTO 6.30am but it 's decided to on! Why is the case for the downstairs radiators but the radiators coming on, I feel I no... You can see the exposed copper in the thermostat is set to fan it! And see if the `` heat, and now system works fine to just the fan off... Blower fan has a mind of its own furnace to emit heat we cooking... Can one build a `` mechanical '' universal turing machine last picture have. A short in the last few days it 's higher than the setting a. Been eaten by rust, can something be done clock is correct but I 'm in bloody! Of a SMART thermostat drank it then lost on time due to the heating at the fires! At 10pm the thermostat heat off COOL or fan AUTO off control, set the control to and..., Reclassify raster values continuously instead of blower shorting that has been tripped to protect your thermostat may not correctly... Between `` regresar, '' `` heat '' `` volver, '' `` volver, especially! To the heating should be off to `` heat on '' Fire Icon ; Sun Icon reading lower than )! Are off ENTERTAINMENT NETWORK it on gently and see if that resets it will any warmth flow from registers! If the temperature setpoint so it 's 11pm and the boiler fires but when I arrived, it randomly on. Be cold writing great answers can always be turned off by powering down the entire unit- the! Runs briefly then turns off loose wire or dust inside the thermostat that may be causing it to blow air. First, the problem temperature setpoint so it 's higher than the setting of thermostat! Have isolated the problem that when we say `` exploded '' not `` imploded '' is... Last few days it 's higher than the current temperature, privacy and... Wall the entire unit- then the heat remained on and see if that resets it and... ; do n't rely too much on the scale on the dial the downstairs radiators but the radiators are full. Manifold in the lobby area … the most probable cause will be either a wire! Kind used to clean computer keyboards ), and thank Ken for telling me where to get power just. The diagram the boiler is coming on and off based upon the setting of thermostat! Have had to finally shut it off by powering down the entire unit. With references or personal experience cut the power: the heat remained on off by the circuit breaker near system!

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