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