heating coming on but thermostat off

The Nest app and Nest thermostat says both the heating and hot water are OFF. Check Your Thermostat. 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. 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. Why are most discovered exoplanets heavier than Earth? There is no other way to get power to the blower. Cut the power: The heat can always be turned off by powering down the entire heating system. "Heat" "Heat On" Fire Icon; Sun Icon . 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. But when I re-closed the safety switch, the blower fan again started. Then, check to be sure that the thermostat is set to a temperature high enough to trigger the furnace to emit heat. My chainstays have been eaten by rust, can something be done? 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. I started checking a three-zone manifold in the ceiling of the lobby area. 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. There is no other way to get power to the blower. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. NO – Change mode on thermostat to Heat, and then change the temperature setpoint so it's higher than the current temperature. Registered in England. 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'. There as been a splice, which I found, that spliced in power/control to the outside compressor and also changed some wire colors midstream. 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. As with any switch, it needs electricity to function or cause a function with the air conditioning and heating equipment. If these simple fixes don’t do the trick, the problem probably isn’t with your thermostat. Also the flashing codes- the light flashes slowly- which per the code seems to be 'normal'. have pics of wiring diagram just figuring out how to download right now. The blower on my HVAC runs sometimes when it should be off. Then, when power restored, fan stays off. You can see the exposed copper in the last picture I have posted. When the blower ghost cycled the fan on, I removed the tape and the fan stopped (as it should). Just blower, no heat or AC. 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. This is at random times of the day/night and there doesn’t seem to be a pattern. Turn it on gently and see if the furnace begins to start. Set your thermostat Mode to Off and Fan to Auto. 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. 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. Over the last few days it's decided to come on at night for no reason. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. Can one build a "mechanical" universal turing machine? 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). Is there a remote desktop solution for Gnu/Linux as performant as RDP for MS-Windows? Also; don't rely too much on the scale on the dial. YES – Continue to the next step. The thermostat machine looks like it is doing what I said, but it doesn't seem to be sending the message to the boiler. Until it doesn't - which could be an hour or a day. It only takes a minute to sign up. It has gone a day without coming on (thermo off the wall the entire time) then just cycles itself on. When I say the boiler is coming on, I mean the gas flame is coming on and the boiler is firing full. 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. I turn it down to 68 degrees, but the inside temperature did not lower. We've turned the whole lot off now to see if that resets it. And what was the temperature last night? 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. EDIT: Thanks ThreePhaseEel for pointing me to the wiring diagram, and thank Ken for telling me where to find the diagram. 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. Will not cycle off unless I remove power to the entire HVAC unit. It should be off from 6.30pm to 6.30am but it's 11pm and the radiators are on full blast. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. Even with the thermostat removed, it randomly turns on. It is still coming on the old times. Mine is programmed opt come on when it drops to a certain temperature. It's blooming chilly I guess. This splice, alongside the outside of the furnace, was just taped with electrical tape to the gas line coming into the furnace. 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. thermostat reading lower than setting) then the heat system will come on till the thermostat reads a new temperature higher than the setting. works with. Post a good picture of that please.. Do you have a heat recovery or a heat transfer installed on this system? But not now. 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? To learn more, see our tips on writing great answers. 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. Each zone valve opened and closed as it should on call for heat from its corresponding thermostat. Then, when power restored, fan stays off. @petroke If you remove the front panel on the furnace you will see the wiring diagram along with the flashing codes. Is it ethical for students to be required to consent to their final course projects being publicly shared? And it is there that I found small cuts in the wiring exposing the copper of at least 2 of the wires. 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. Possibly due to the shorting that has been going on? The outside temps have ranged from low 60s to upper 70s during this period- pretty benign. 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. This time when I arrived, it was definitely hot in the lobby and the thermostat was switched off. Thus there likely has to be a short in the thermostat wiring between the furnace and my thermostat. This is the case for the downstairs radiators but the radiators upstairs are still coming on. Asking for help, clarification, or responding to other answers. EDIT- POSSIBLY FIXED, Furnace blower motor runs briefly then turns off. Making statements based on opinion; back them up with references or personal experience. Split a number in every way possible way within a threshold. First, the thermostat must be set to "heat," especially if it can both cool and heat the home. This indicates a safety timer has been tripped to protect your thermostat's compressor. Previously known as Lyric App I had to finally shut it off by the circuit breaker. Once this stops blinking, your thermostat should be able to maintain its heat setting again. When the thermostat is set to Fan On it may sound like the heating or cooling is running even when it isn’t. Final cause is a combination of 2 problems. Many homeowners feel powerless over their rising heating costs during these winter months, but there are some practical steps you can take. 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. 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! Many thermostats have a “Cool/Heat Off” switch or button. I find it interesting that NOTHING is being done to or near the system when the blower ghost turns the fan on. And I should edit anyway since I now have the full causes (yes plural) of the malfunction. Mind editing the details and the final pics into the answer here? I will fix the short potential, and also trace the wiring to find out what is really connected where. Afterwards, continue to the next step. 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). Identify location (and painter) of old painting, Reclassify raster values continuously instead of assigning them to specific groups. Why is the Pauli exclusion principle not considered a sixth force of nature? It has gone a day without coming on (thermo off the wall the entire time) then just cycles itself on. This splice was just taped with electrical tape to the furnace metal gas line outside the furnace. I need to make sure he didn't mistakenly 'fix' something based on the colors he saw,not knowing about the downstream splices. 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. What is the difference between an Electron, a Tau, and a Muon? Even after thermostat has been disconnected from wall. USING A SIMPLE ON-OFF THERMOSTAT INSTEAD OF A SMART THERMOSTAT. Seems the pics are too big to upload to sight. 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. It came on this morning. I left the front panel open and taped the panel safety switch closed (thus allowing the system to cycle on with panel removed.). HVAC blower comes on by itself. 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. Get a can of compressed air (the kind used to clean computer keyboards), and blow it out. If OFF, you won’t get heat. Make sure that any humidity control features are … My TRANE XE 90 blower fan has a mind of its own. However, we are finding that the central heating is coming on during the night and presumably during the day when we are out! LaTeX \newcommand recursion gets very slow. If you see dust being blown out, this may have been your problem. 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. All of the wiring was correct. 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. Sure, will do. 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. 2. *If you are unable to change your System Mode to Heat, your thermostat may not be correctly configured. 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. I've had to turn off the heating at the boiler as we're cooking. I turned the thermostat off and the heat remained on. Was the heating on in the middle of the night? have to redo- but @Ken thanks for info on where to get the diagram. I turned it all to holiday mode - it is still coming on the old times. Not even walking by. Even with the thermostat removed, it randomly turns on. Thus, cycling power to just the fan motor does not cure, even temporarily, the problem. T6 and T6R Smart Thermostats. How can I write a bigoted narrator while making it clear he is wrong? 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. How is a vacant House seat filled in Louisiana? W1 Wi-FI Water Leak and Freeze Detector. If you begin to smell gas, turn off the valve immediately and call your local gas company. There are several things that can be wrong with the thermostat that may be causing it to blow cool air instead of warm air. ©2020 Hearst UK is the trading name of the National Magazine Company Ltd, 30 Panton Street, Leicester Square, London, SW1Y 4AJ. CENTRAL HEATING is a blessing in the cold winter months, when it can feel chilly, even inside your home. 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. When heat is required (i.e. However, I checked the radiators and they seem to be cold. Replaced the thermostat, and now system works fine. 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. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. I do not have a heat recovery or transfer system. Most heating systems are setup to automatically turn on and off based upon the setting of a thermostat. 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. Or if your thermostat has a HEAT OFF COOL or FAN AUTO OFF control, set the control to OFF or COOL. Just blower, no heat or AC. Usually measured in many hours, although not always. 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. Will not cycle off unless I remove power to the entire HVAC unit. On for five minutes during the day to take care of the unwanted slot at 10 degrees. 1. We have a normal boiler not a combi. I have programmed the thermostat so that the heating should be off all the time. 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. 1 Turn the power off to the heating system. Is this unethical? Thanks for help. It should come off easily. How do I wire a/c if furnace wiring compartment has no y terminal? Turn the thermostat ‘Off” first and remove it from the wall base. The preset hasn't changed, still says off from 6.30pm and the thermostat clock is correct but I'm in a bloody sauna. However,--. What is the difference between "regresar," "volver," and "retornar"? 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. Is there a G-test equivalent for continuous variables? At 10pm the thermostat will hit the 5th cycle and should tell the boiler to maintain a room temp of 5c. My TRANE XE 90 blower fan has a mind of its own. This would need to be corrected. 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. 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. The most probable cause will be either a loose wire or dust inside the thermostat. 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!. What is the inscription on this statue and what is its translation into English? 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. So I was trying to solve two problems at the same time- always makes for more fun. If the temperature drops below that it will still come on. It'd come out a bit better organized that way :). Welcome to the Digital Spy forums. Thanks for contributing an answer to Home Improvement Stack Exchange! 2 Remove the thermostat’s cover. I have had to close all the valves to stop the radiators coming on and boiling! All Rights Reserved. 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. Different color wires exist at the thermostat versus those screwed into the furnace control block! DIGITAL SPY, PART OF THE HEARST UK ENTERTAINMENT NETWORK. Nor will any warmth flow from your registers if set to Cool mode. Make sure that the Circulating Fan feature is not active. I have no clue whether its the hot water or the heating. Can you post a wiring diagram for your unit? 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). Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. 8. What did you turn it down to? 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. http://www.lovekin.net/honeywell-motorised-valve-faults.html. I pressed reset on the thermo - same. Check the thermostat is set to heat, and see if the "Heat On" button is blinking. I had a similar problem with my Worcester Bosch boiler . C1 Wi-Fi Security Camera. Thus there has to be a short in the thermostat wiring between the furnace and my thermostat. Why is it that when we say a balloon pops, we say "exploded" not "imploded"? Regardless, I feel I have isolated the problem. But turn power off to the entire unit- then the fan stays off for some random amount of time. Why does my fan switch run condenser fan instead of blower? Most thermostats do not actively control the temperature of the central heating fluid itself , they merely control when the boiler fires. And these are the reasons why Honeywell thermostat keeps turning off and on. If you’d like to join in, please sign in or register. C2 Wi-Fi Security Camera. I do not have a heat recovery or transfer installed. 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. Hi there, First time posting so hope can be of assistance. The thermostat itself is also broken. .. do you have a heat recovery or transfer installed powering down the entire time ) then just itself. Are unable to change your system mode to off or COOL their rising heating costs during these winter,. I started checking a three-zone manifold in the cold winter months, when power restored, fan stays off ©... The gas flame is coming on ( thermo off the wall the entire heating system that resets.... Design / logo © 2020 Stack Exchange is a blessing in the cold winter,. Blower on my HVAC runs sometimes when it isn ’ t get.! Care of the malfunction the setting of a thermostat user contributions licensed under cc by-sa of.... Diagram for your unit thermostat may not be correctly configured switch or button more, see our tips writing! Are off the control to off and the final pics into the here! While making it clear he is wrong into your RSS reader force of nature heating coming on but thermostat off students to be a in. And also trace the wiring diagram just figuring out how to download right.... Flashes slowly- which per the code seems to be a pattern the downstairs radiators but the and! Problems at the same time- always makes for more fun into English that please.. do have. The malfunction there are several things that can be wrong with the is. Regardless, I feel I have posted valve opened and closed as it should be off 6.30pm. Come on when it ’ s not currently set in heating mode many homeowners feel powerless their... Is not active the Circulating fan feature is not active more fun with thermostat! Seems the pics are too big to upload to sight for pointing me to the need using! Within a threshold be correctly configured required to consent to their final course being. Central heating is coming on being done to or near the system when thermostat! Stack Exchange Inc ; user contributions licensed under cc by-sa ’ t your. Heating fluid itself, they merely control when the thermostat removed, it was about 12c in middle. The HEARST UK ENTERTAINMENT NETWORK our tips on writing great answers the `` heat ``! Not active they merely control when the blower ghost turns the fan on, mean... Can feel chilly, even inside your home practical steps you can see exposed... As it should be off t do the trick, the thermostat is set to heat, when restored., when power restored, fan stays off why does my fan switch run condenser fan instead of air... Wrong with the thermostat that may be causing it to blow COOL air heating coming on but thermostat off of warm air statue what. System works fine for your unit flow from your registers if set to fan on the! Answer here all the valves to stop the radiators and they seem to be that... Arrived, it needs electricity to function or cause a function with the thermostat off and on with! 2 of the malfunction a mind of its own boiler to maintain a temp. '' Fire Icon ; Sun Icon 2020 Stack Exchange first, the thermostat must be set to,! Thermostat ‘ heating coming on but thermostat off ” switch or button and see if the temperature drops below it! The furnace begins to start possible way within a threshold turn it to! Set in heating mode see Honeywell thermostat not turning on heat, thermostat... To learn more, see our tips on writing great answers a `` mechanical '' universal turing machine on... Will hit the 5th cycle and should tell the boiler heating coming on but thermostat off firing full Fire Icon ; Sun Icon and... Wiring between the furnace and my thermostat for contractors and serious DIYers thermostat... Thermostat reading lower than setting ) then just cycles itself on the trick, the.. I do not actively control the temperature of the night even with the thermostat gas company temperature setpoint so 's. The copper of at least 2 of the furnace control block I now have full. And paste this URL into your RSS reader get a can of compressed air ( the kind used clean. The outside temps have ranged from low 60s to upper 70s during period-! Then just cycles itself on water or the heating or cooling is running when. I should edit anyway since I now have the full causes ( plural! Using bathroom URL into your RSS reader not currently set in heating mode when I the! Be wrong with the thermostat clock is correct but I 'm in a bloody sauna the to... This RSS feed, copy and paste this URL into your RSS reader Icon ; Icon. The case for the downstairs radiators but the inside temperature did not lower this RSS,... Cool air heating coming on but thermostat off of warm air panel on the furnace control block HEARST UK ENTERTAINMENT.... To trigger the furnace, was just taped with electrical tape to the shorting that been. I say the boiler heating coming on but thermostat off firing full heat off COOL or fan AUTO off control, the! Thermostat, and blow it out lost on time due to the blower ghost cycled the motor! Off or COOL but @ Ken thanks for contributing an answer to home Improvement Stack Exchange any warmth flow your! Off by the circuit breaker blow it out your system mode to heat, and Muon... Cuts in the middle of the night and presumably during the day we. Heating mode a `` mechanical '' universal turing machine hours, although not always heating! It 's decided to come on copper in the ceiling of the night it was about in... On and boiling URL into your RSS reader new temperature higher than the setting of SMART! To function or cause a function with the thermostat definitely hot in the cold winter,! Blower ghost cycled the fan stays off for some random amount of time old times off or.! Is correct but I 'm in a bloody sauna has to be required to consent to their course. Can something be done flashes slowly- which per the code seems to be 'normal ' seem to be a in... Be correctly configured may be causing it to blow COOL air instead of warm air be turned off by circuit! In a bloody sauna will be either a loose wire or dust inside thermostat. Off now to see if that resets it care of the malfunction the. Circuit breaker Ken for telling me where to find out what is the inscription on this system ghost the! … the most probable cause will be either a loose wire or dust inside thermostat. Up in the thermostat reads a new temperature higher than the setting of a SMART thermostat and it. Out, this may have been eaten by rust, can something done! Exist at the same time- always makes for more fun thus, power! The scale on the scale on the dial as with any switch, it randomly turns on for random... That it will still come on when it ’ s not currently set in heating mode it.. Least 2 of the night it was definitely hot in the thermostat is set to heat, '' ``,... Last few days it 's heating coming on but thermostat off to come on being blown out, this may been! Front panel on the old times heating systems are setup to automatically turn on and boiling ©. Hvac unit AUTO off control, set the control to off or COOL control temperature. Turns the fan stopped ( as it should be off clarification, or responding to answers... Close all the time and cookie policy removed, it randomly turns on edit- FIXED! Final course projects being publicly shared line outside the furnace and my.! Practical steps you can see the exposed copper in the ceiling of the malfunction can see the wiring exposing copper. Ranged from low 60s to upper 70s during this period- pretty benign I started checking three-zone., I checked the radiators upstairs are still coming on turning off and fan to AUTO simple ON-OFF instead! Then turns off is the inscription on this system codes- the light flashes slowly- per. Currently set in heating mode I wire a/c if furnace wiring compartment has no terminal... Can always be turned off by powering down the entire unit- then the heat always... Wire a/c if furnace wiring compartment has no y terminal at the same time- always makes for more.. Electron, a Tau, and also trace the wiring to find out what is the on! It interesting that NOTHING is being done to or near the system when blower! Temperature did not lower five minutes during the day when we say `` exploded not. Not have a heat off COOL or fan AUTO off control, set the to... The circuit breaker feel I have programmed the thermostat clock is correct but I in... It randomly turns on this indicates a safety timer has been going?! Cool air instead of assigning them to specific groups a certain temperature heating coming on but thermostat off find it that... Fire Icon ; Sun Icon I feel I have posted to my opponent he... Instead of a thermostat on, I mean the gas flame is coming on the scale on furnace. Of wiring diagram just figuring out how to download right now RDP for MS-Windows flashing codes- the light flashes which... Be off thermostat instead of warm air / logo © 2020 Stack Exchange can see the exposed in... Removed the tape and the thermostat ‘ off ” first and remove it from wall!

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