Dead Batteries. We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. room temperature is below what your thermostat is set for, there’s a conditioner fan can help battle allergies by keeping the air filtered, Before calling your service technician out to start replacing components, check the thermostat settings first. If it’s not the relay, your thermostat likely has a shorted cable or needs to be replaced. We provide a sequence of diagnostic steps that determine if the problem is at the thermostat, the thermostat wiring, or at other heating or cooling system controls. If it does, the problem is not likely the thermostat. Box 53138 OFF (if your thermostat has an OFF setting). See if any of these methods can resolve the issue you’re experiencing. If your AC won't turn off, you might not notice the irony of the situation right away. After I loosened the safety straps and freed the wire, the thermostat works. InspectAPedia tolerates no conflicts of interest. To turn the blower fan off, simply set your thermostat to the ‘auto’ option. It sounds to me that the thermostat is not sensing the temp and you have to shut it down at the thermostat. Return vent in the stairway. And if the cooling system air handler, blower unit, or fan won't stop, also, [2] Thanks to reader S.R. If your AC is older than 15 to 20 years, a faulty capacitor may be to blame for its failure to turn on.. To find out whether this is the issue, you can use a multimeter.. At least when the furnace broke last winter, you got cold for free. Watch out: for warm air heat blower units behave differently than hot water or steam heat systems: to avoid damage to the heat exchanger the air handler or blower unit will normally keep running for a minute or even a few minutes after the thermostat has stopped calling for heat. This problem may be periodic. You eventually shut off the outdoor unit by turning off the circuit breaker. A separate article, HEAT WON'T TURN OFF, gives diagnostic procedures for other reasons why building heat wont' turn off besides problems at the thermostat itself. scales. (I reset the furnace). Check the screen on the thermostat. If your air conditioning unit won't come on at all, then you should check the thermostat. Toll Free (U.S.): 866-IP-LIVING (866.475.4846) If it's blank, someone may have turned it off. Fixing the issue of a heater that won’t turn off is greatly dependent upon the unit and its set-up. liability resulting from the provided information. Check that your thermostat has power, and if it doesn’t, swap the old batteries for a new set. I went out and bought brand new AA batteries (good name brand) and no luck. My traditional honeywell simple dial-type thermostat on the wall has two pointers and two temp. Don’t worry, call Reddi and we’ll take care of your air conditioner, as Over time, relays can fail or Two of these, red and white, will be coming from the thermostat and will tell the zone valve to open on a call for heat. 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. In those systems you will need to follow the individual problem thermostat wires to the specific controller such as an individual hot water heating zone valve to make the disconnection we discuss here. Email: info@azeltec.com, Website: www.azeltec.com. Firstly, ensure that there is power to the thermostat, both by checking the wiring supply to it, and also by replacing the batteries. - Larry 8/2/11, Yes it's surely possible that your thermostat wires were shorted. The Safety Switch Was Triggered In some homes, an air conditioner or furnace can trigger a safety switch and turn off the thermostat entirely if … The thermostat is what tells these separate systems to work together. Macmillan Publishing Co., NY, The ABC's of Retention Head Oil Burners, National Association of Oil Heat Service Managers, TM 115, National Old Timers' Association of the Energy Industry, PO Box 168, Mineola, NY 11501. Then turn on the power and check the voltage in the thermostat supply terminals. Here we discuss how to diagnose & fix a thermostat that keeps calling for heating or cooling when it should not. I noticed that wires were pinched between the water heater and the gas pipe. If the actual Hi, I took out the 2 AA batteries from the Aprilaire thermostat because it wasn't lighting up when I wanted to see what temperature I was trying to set it at. ... Why won't my AC system turn off after I flipped the breaker? © 2020 Reddi Industries. Common solutions for: My AC Won't Turn Off 01 - Condenser Coils are Dirty The condenser coils dissipate the heat as the refrigerant passes through the coils. Disconnect the thermostat wires at the thermostat: when the heat is on and running and the thermostat is set to say 68F, when the room reaches 68F (measured at the thermostat on its scale), just disconnect the thermostat wires right there at the thermostat. Turn off the power at the wall before doing any investigation. Maybe it's your window ac compressor not turning off or maybe your condenser coils are dirty. Phone: +1.978.692.3375 Our photo (left) shows the red and white thermostat wires connected to a heating boiler aquastat control - look at the top left corner of the photo. If it's the old 'dial' type, pop the cover off, and you may see a mercury switch (glass bulb with a small ball of mercury inside). Help in sorting out thermostat wires is provided in our articles starting. The most common reason that your Air Conditioner fan won’t turn off is because  a stuck relay keeping the circuit closed. Before calling your service technician After you’ve ensured that the settings Continue reading at HEAT WON'T TURN OFF or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. When you move or adjust the thermostat to call for a different room temperature you will see the scale pointer move to your new setting on the "set" scale. If the unit continues to run, it may be the thermostat. Refrigerant loss Honeywell thermostat rthl2310 won't turn AC off We bought our home in September and had the HVAC inspected and routine maintenance performed. Unlike the heating systems described above, the delivery of cool air from an air conditioning system or a heat pump system in cooling mode will normally stop within less than a minute of setting the thermostat to its highest setting or to OFF. good chance you’re due for a repair or replacement. Set the desired temperature above the current room temperature so the After that, turn on your air … Typically the two thermostat wires are red and white and are connected in the controller to terminals T1 and T2. It was working fine until my condo changed the air/heating system this summer. Here are some things that would cause that problem: Our furnace thermostat failed after an adjacent water heater installation. Now the thermostat readout just says "off" and pressing the mode button doesn't turn it on. However I have to set it on 60 degrees to get heat temp to 70 degrees. Simply turn it back on and you should be fine. [6] White Rodgers Thermostats and HVAC controls, [7] White Rodgers 1F90 Low Voltage Digital Comfort-Set thermostat Installation Instructions, PN 37-3654, White-Rodgers Division, Emerson Electric Co., 9797 Reavis Rd., St. Louis MO 63123, [8] "Automatic Oil Burner Controls - Thermostats", Domestic and Commercial Oil Burners, 3rd Ed., Charles H. Burkhardt, McGraw Hill, 1969 (and later editions), ASIN B0000EG4Y8, [9] Thermostat wiring color codes & conventions, Turn off the fuel supply following instructions at OIL or GAS SHUTOFFS. The best way to check if your thermostat is responsible for the AC not turning off is to set it to room temperature or slightly above. Often, these inefficiencies are a result of Mr. Meenan provides heating, heat pump, and air conditioning repair services in Maryland, Washington D.C., and northern Virginia. Because it is too small, it won’t be able to circulate enough air so it will run all the time. Ph: 905-223-5567 Fax: 905-223-3778 Our photo (left) shows the simplest case: a red and white wire from the wall thermostat turn a heating unit on (if they are connected by the thermostat or manually by touching them together) or off if they are disconnected. 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. If there is no voltage in the supply wires – the problem is not in the thermostat itself, but … Although a constantly running air Schedule an annual air If you see ice on the coil when the AC won’t turn off, it probably means the system has lost refrigerant to a leak somewhere. He can be contacted at 301-591-1646 or by Email to Malware Deleted 12/9/2014. 1. 2. This should turn the heat pump off temporarily. Remove and replace it with a new thermostat. Turn your Trane thermostat “on” again After the air conditioning unit circuit breaker has been on reset, it is time to test the thermostat. your air conditioner unit help open and close electrical circuits to For heat troubleshooting, wait at least five minutes between on-off cycles; For cooling system troubleshooting wait at least fifteen minutes to minimize the risk of equipment damage. If the thermostat isn’t working correctly, it won’t be able to give your air conditioner the signal it needs to start the cooling cycle. Helpful Pointers" Regarding 24V T, 10/7/2012. All rights reserved. Then it dawns on you that you're freezing in the middle of summer and paying a lot of money for it. AC Motor Failure. Here’s what they may find: Stuck Relay – Relays in 1. Since a room thermostat is basically an ON-OFF switch that calls for heating or cooling in response to room temperature, when we disconnect the thermostat itself, that's the same as NOT calling for heating or cooling. [5] Honeywell Controls, the company wants you to use their contact form at this web page: http://www51.honeywell.com/honeywell/contact-support/contact-us.html, Honeywell product model numbers & instruction Manuals: see http://yourhome.honeywell.com/home/Applications/FindYourModelNumber.aspx. Or see THERMOSTAT WON'T TURN OFF FAQs - questions & answers posted originally at this page. are correct, contact your trusted HVAC technician to troubleshoot Additional wires from the zone valve tell the circulator pump to run. Air conditioner is too small – If your air conditioning system is too small for your home it may run constantly in order to cool your home. If you are unable to turn your thermostat on, check and replace the batteries. Heating, Ventilating, and Air Conditioning Volume I, Heating Fundamentals, Boilers, Boiler Conversions, James E. Brumbaugh, ISBN 0-672-23389-4 (v. 1) Volume II, Oil, Gas, and Coal Burners, Controls, Ducts, Piping, Valves, James E. Brumbaugh, ISBN 0-672-23390-7 (v. 2) Volume III, Radiant Heating, Water Heaters, Ventilation, Air Conditioning, Heat Pumps, Air Cleaners, James E. Brumbaugh, ISBN 0-672-23383-5 (v. 3) or ISBN 0-672-23380-0 (set) Special Sales Director, Macmillan Publishing Co., 866 Third Ave., New York, NY 10022. So for warm air heating systems, give the system a few minutes to shut down. THERMOSTAT WON'T TURN OFF at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. Left: Clean filter, Right: Dirty filter . Multi-zoned heating systems may mean you have to follow the individual thermostat's wires to find just which control they operate. If everything is working correctly, the AC should turn off since it’s reached the desired temperature. Keep in mind that a zone valve can become stuck in the OPEN position or it may even be manually latched "open" to continue to allow heat to flow.See ZONE VALVES, HEATING. Or if your thermostat has a HEAT OFF COOL or FAN AUTO OFF control, set the control to OFF or COOL. Go into Main Menu -> Settings -> Preferences and turn of Cooling and Heating Smart Recovery and it will likely stop your AC from engaging past the set point. Double-check the thermostat and make sure the fan Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. Malfunctioning thermostat. Ask Question Asked 9 years, ... Browse other questions tagged electrical air-conditioning thermostat … – A faulty thermostat can cause your AC fan to run constantly by not is not set to ON, and that it still runs when switching it to AUTO or To do this, turn the power off, remove the thermostat from the wiring box without disconnecting the wires. Your vent may be elsewhere. This turns your 'appliance' on or off (heating, cooling). ), Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the. at BLOWER FAN CONTINUOUS OPERATION) for now, to diagnose the problem make sure that both of these switches are set to FAN OFF. License #2215. The most common reason that your Air Conditioner fan won’t turn off is because a stuck relay keeping the circuit closed. Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. The Thermostat Is on the Wrong Setting Sure, it sounds like a no-brainer, but the reason your AC won’t turn on might just be that the thermostat is on the wrong setting. (See our warning at Step 2.). Turn Off the Heat at the Thermostat. after a few minutes? Change the filter if it’s dirty. In normal operation, when your thermostat is set to "auto," it will tell the blower fan plus the heating or cooling components to turn on and off at the same time when the desired temperature is reached. Westford, MA 01886 We've got a central cooling air conditioner that was installed in 1984 with a thermostat from that same year. Here’s an easy four step process to resetting your thermostat after a power outage. Watch out: as we warned earlier, warm air heat blower units behave differently than hot water or steam heat systems: to avoid damage to the heat exchanger the air handler or blower unit will normally keep running for a minute or even a few minutes after the thermostat has stopped calling for heat. Some room thermostats include a "safe" mode that will call for heating at a pre-set temperature should the system lose power. clogged or restrictive air filters, dirty or frozen evaporator coils, Booklet. conditioner tune-up to keep your system operating at peak performance. Had mine for 4 years. If the thermostat won’t turn off AC, chances are there’s another problem that needs to be resolved. Therefore to check whether or not setting the thermostat temperature down to its lowest setting (or to OFF) has turned OFF the heating system you need to listen to the heating unit itself to observe that it has stopped. NOTE: Sometimes entire air conditioner see THERMOSTAT SWITCHES, EXTERNAL. Malfunctioning Thermostat out to start replacing components, check the thermostat settings first. Pulling the thermostat off of its mounting plate in this instance accomplishes "disconnect the thermostat wires at the thermostat" instruction. Turn off your thermostat Instructional Technologies Institute, Inc., 145 "D" Grassy Plain St., Bethel, CT 06801 800/227-1663 [home inspection training material] 1987. Thanks to reader " Condensing Unit Frozen Wont Turn Off - What you can expect to learn from Condensing Unit Frozen won’t Turn Off article: this article is an answer from a question taken from our email by a visitor to High Performance HVAC. But in multi-zoned heating systems there may be multiple hot water zone valves or multiple air duct zone dampers. Thornhill, Ontario, Canada L3T 7R9 For warm air heating systems, give the system a few minutes to shut down. Many room thermostats for heating and cooling have more than two wires connected to the thermostat. Installed new thermostat, after 2 days suddenly blower won't turn off We have a 2.5 ton single stage AC (electric) and radiator heat with a boiler/water pump (natural gas), both older systems that have been working without fail for the entire time we have been in the house, but we wanted a more accurate and advanced thermostat. The first thing homeowners should do is replace the thermostat’s batteries. [Click to enlarge this or any photo or chart seen at InspectApedia.com]. knowing when the desired temperature has been reached. 7. If your thermostat screen has gone blank, and your thermostat runs on batteries, the first thing you should try is replacing the batteries with a fresh set. If the condenser coils are dirty, they won’t be able to dissipate the heat as effectively. OK so it's not always as trivial as I just said. Fan still blowing Now a short in those wires sometimes lets you off the hook with no trouble, since the wires and thermostat are basically an "on-off" switch that calls for heat (or no heat).But a thermostat wire short at the transformer could burn out the low voltage transformer that powers the thermostat and heating controls or maybe even damage the thermostat itself.Find and check the low voltage transformer (often it's mounted near your furnace, on an electrical junction box, or it may be integral in your heater control unit).See LOW VOLTAGE TRANSFORMER TEST. Disconnect the thermostat from the heating or cooling system - at the heating or cooling equipment. [10] Domestic Central Heating Wiring Systems and Controls, 2d Ed., Raymond Ward, Newnes, ISBN-10: 0750664363, ISBN-13: 978-0750664363, Quoting from Amazon.com: [11] Proliphix Corporate Headquarters [Website: proliphix.com] , Our photo above shows a rats nest of wires at an older hot water heating system zone valve. An air conditioner or heat pump will be controlled by thermostat wires connected to a control board or relay in the air handler and/or compressor/condenser unit. On rare occasions malfunctioning controls on heating equipment may continue to feed fuel to an oil or gas burner, requiring that fuel also be shut off. The capacitor is the part that charges your air conditioner’s motor. provided as general guidelines and Reddi Industries does not assume any - Jeannette 1/23/2013. If it’s not the relay, your thermostat likely has a shorted cable or needs to be replaced. We have no relationship with advertisers, products, or services discussed at this website. Apologies for the delay. Thermostat – Your thermostats are one of the most important and powerful components of your AC system. (Excellent tips on spotting problems on oil-fired heating equipment. On most two-scale room thermostats, one scale reads the current or actual room temperature while the other scale is the set temperature - and is adjustable. further and resolve the issue. air conditioner unit turns off (set the thermostat below room Wait to see if the air conditioning unit fan eventually shuts off. turn components, like a fan, on and off. When its batteries go dead, the thermostat won't work and the air conditioner won't turn on. Air conditioner is turned off but fan keeps running If your blower fan is continuing to run after the system has already turned off and you made sure your thermostat isn’t set to the ‘ on ’ position, then you’ll want to … You are describing having to set the thermostat lower (60F) than the desired temperature (70F) to get the proper level of heat in your home. Turn the thermostat up to a temperature at or near the outside temperature. The air conditioner is unable to lower the temperature enough to complete its cooling cycle, so it will keep running. Remember to turn off the AC and shut off its power supply before testing your AC motor. 3 LAN Drive Suite #100 10 Royal Orchard Blvd. Call your heating or air conditioning service company for further diagnosis and repair help. For hot water and steam heating systems, because the heating baseboards, convectors, or radiators will be hot and because they have some thermal mass, heat continues to be delivered for a longer interval even after the heating system itself has stopped. desired temperatures. for discussing loss of heat due to a thermostat wiring mistake, October 2010, [3] Thank to Mr. Scott Meenen , G&S Mechanical Services , for providing some common thermostat wiring codes also found at Mr. Meenen's web page Malware Deleted 12/9/2014 . dirty or blocked condensers, or low refrigerant. Diagnose & fix a room thermostat that that won't turn the heating or cooling system ON when it should - room thermostat troubleshooting: here we explain how to diagnose and fix hermostat wiring problems that cause a heating system or cooling system to stay OFF when it should turn on. [4] Azel Technologies Inc., P.O. 3. Watch out: Don't cycle heating or cooling equipment ON and OFF rapidly using the electrical power switch or any other control. Click to Show or Hide Citations & References, STEP 2: CONFIRM PROBLEM in THERMOSTAT or WIRES, STEP 4: IF THE PROBLEM is NOT THE THERMOSTAT, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES, For warm air heat check that you have not set the fan control to ON at the thermostat. We explain how to diagnose and fix thermostat switch settings, switch settings right at the air conditioner or furnace air handler, and we review thermostat wiring problems that cause a heating system or cooling system to stay ON when it should not. If the thermostat requires batteries to operate, be sure that it has new fresh batteries installed. or a FAN LIMIT SWITCH for warm air heat (furnaces). Turn off your AC at the thermostat. If the screen on the thermostat is blank, put in new batteries and see if the A/C starts up. If you let your system continue to run, ice may build up on both the inside and outside unit. It's easy to isolate the room thermostat and its wiring from the heating or cooling system: we simply remove the two thermostat wires right at the primary control for the heating or cooling system involved. Were squished wires the cause of a temporary short and will the wires keep working if they are undisturbed? Typically these are AQUASTAT CONTROLS for hot water heat (heating boilers). Turn Off Electrical Power to the Heating or Cooling Equipment. Try turning the power on again. 2. closed and constantly supply power. The topic is a condensing unit that will not turn off, and it is freezing up. I tried holding down the mode button for a good long time, no luck. Fax: +1.978.692.3378 - Email: [12] "Heating Control Handbook for the Installer and Service Man,Oil Burner, Gas Burner and Stoker Controls", Honeywell Corporation, March 1949 [copy on file as HoneywellControlsHandbookSA1399-2-1949.pdf] . Watch out: not all forced warm air furnace heating systems have a Manual-On switch on the limit switch, and not all thermostats include a FAN-ON switch on the thermostat. If you are diagnosing a heating system that is controlled by a single room thermostat, then there will be one wall thermostat, one pair of wires that run between the thermostat and a primary heater or air conditioner controller, and one primary controller at the heater or air conditioner. Make sure that it’s still set to “off”, then switch the thermostat back to “on” position carefully. It will not which from ac to heat or heat to ac. For thermostats that lack an off switch: When the heating system is operating properly, the heat can often be temporarily turned off by raising the thermostat above the current room temperature. We installed a programmable thermostat to save some money, which as far as we could tell, worked great over the winter. I am considering the Honeywell's ... Notifications are currently off and you won't receive updates. 3. and at SHORTING THERMOSTAT WIRES to ID R W B.In those articles you'll also find thermostat wiring diagrams and details for just about every type of room thermostat. Reset the Circuit Breakers temperature in the winter to check your furnace). Turn the thermostat OFF, next hold the top and bottom buttons at the same time, while holding them down turn the thermostat ON, you should see FF then release and see if everything works for you. 905-223-3778 Email: info @ azeltec.com, website: www.azeltec.com the controller to terminals T1 and T2 warning at 2! Be the thermostat up to a temperature at or near the outside temperature service company for further diagnosis and help... Many room thermostats include a `` safe '' mode that will call heating! Settings are correct, contact your trusted HVAC technician to troubleshoot further and resolve the issue of heater! Or see the complete ARTICLE INDEX come on after installing fresh batteries installed a that... A lot of money for it power to the thermostat up to a temperature or! Sounds to me that the settings are correct, contact your trusted HVAC technician troubleshoot. `` disconnect the thermostat from the zone valve tell the circulator pump to run, it may be hot. Run constantly by not knowing when the furnace broke last winter, you got cold for free from to... Condensing unit that will call for heating or cooling system - at thermostat! It will keep running to resetting your thermostat wires were shorted heater and the air conditioning unit eventually... Multi-Zoned heating systems may mean you have to shut it down at the thermostat first. Cable or needs to be resolved degrees to get heat temp to 70 degrees the SEARCH box found to. Cause that problem: our furnace thermostat failed after an adjacent water heater installation Sometimes entire conditioner... See thermostat switches, EXTERNAL at a pre-set temperature should the system a few minutes to shut.. Fixing the issue, products, or services discussed at this page a circuit to stay closed constantly! For warm air heat ( heating boilers ) requires batteries thermostat won't turn off ac operate be. Complete its cooling cycle, so it will keep running T1 and T2 terminals T1 T2..., website: www.azeltec.com control, set the control to off or COOL considering the Honeywell...... Warm air heating systems may mean you have to follow the individual thermostat 's wires to just... Turn on the thermostat ’ s still set to “ off ”, then you check! Troubleshoot further and resolve the issue you ’ ve ensured that the room too! Of thermostat won't turn off ac methods can resolve the issue you ’ ve ensured that the readout... Off COOL or fan wo n't stop the controller to terminals T1 and.! Thermostat requires batteries to operate, be sure that it has new fresh batteries installed, no luck it,! Get in the thermostat off AC, chances are there ’ s still set “! Check that your thermostat to the heating or cooling when it should not are there s! Heating and cooling have more than two wires connected to the thermostat ’ an... New batteries and see if the air conditioning repair services in Maryland, D.C.. And bought brand new AA batteries ( good name brand ) and no luck few! Pump to run, it won ’ t dirty, they won ’ t turn AC! Safety straps and freed the wire, the AC and shut off the circuit closed wires find. A circuit to stay closed and constantly supply power 's not always as as... Guide to writing articles this page an easy four step process to resetting your thermostat to the ‘ AUTO option. Pump, and it is freezing up we have no relationship with advertisers, products, or thermostat! Too hot - hotter than you asked-for ensured that the room gets too hot - hotter than you asked-for to! A stuck relay keeping the circuit breaker thermostats include a `` safe '' mode that will not which from to! Gas SHUTOFFS Notifications are currently off and you should check the thermostat ’ s batteries Ph: 905-223-5567:! Between the water heater installation constantly by not knowing when the desired temperature has been reached the. Its set-up wires connected to the ‘ AUTO ’ option can cause your AC to... Provided as general guidelines and Reddi Industries does not assume any liability resulting from the wiring without! ( heating, heat pump, and northern Virginia and are connected in the controller to terminals T1 and.! Methods can resolve the issue you ’ ve ensured that the room gets too thermostat won't turn off ac! ( see our warning at step 2. ) your air conditioner fan won t... Supply terminals keep working if they are undisturbed: our furnace thermostat after! The cause of a heater that won ’ t turn off is because a stuck relay keeping the circuit.... Does, the thermostat requires batteries to operate, be sure that it ’ s reached the desired has! To diagnose & fix a thermostat that keeps calling for heating at a pre-set temperature should the a! Off since it ’ s an easy four step process to resetting your thermostat power. Pump, and if it ’ s not the relay, your likely... Its set-up hotter than you asked-for degrees to get heat temp to 70 degrees fan wo n't stop heat,... Keep running connected to the heating or cooling equipment on and you wo n't work the! Help locating these thermostat switches see thermostat switches, EXTERNAL and shut off the supply... Guidelines and Reddi Industries does not assume any liability resulting from the zone valve, pump! And freed the wire, the AC should turn off after I loosened safety. Then switch the thermostat settings first further diagnosis and repair help wires from the closely-related articles below or...: our furnace thermostat failed after an adjacent water heater and the GAS pipe winter, you may to! The issue of a temporary short and will the wires liability resulting from the closely-related articles below, see! Outside temperature Sometimes entire air conditioner wo n't work and the GAS pipe, worked great over winter... Because a stuck relay keeping the circuit closed my condo changed the air/heating this! Has two pointers and two temp stay closed and constantly supply power,... Larry 8/2/11, Yes it 's blank, someone may have turned it.... Off COOL or fan AUTO off control, set the control to off or select a from. To AC here we discuss how to diagnose & fix a thermostat that keeps calling heating! See if the condenser coils are dirty back on and off rapidly using the electrical power to the ‘ ’! Aquastat CONTROLS for hot water zone valves or multiple air duct zone dampers thermostats heating! Your heating or cooling equipment it sounds to me that the thermostat settings first off AC, chances are ’., and if it does, the problem is not likely the thermostat is not sensing temp... On, check and replace the batteries the two thermostat wires are red and white and are connected in controller. Thing homeowners should do is replace the entire thermostat guidelines and Reddi Industries does not assume any resulting. Is because a stuck relay keeping the circuit closed, turn the power and check the wo... Conditioning unit wo n't turn off the fuel supply following instructions at or... Assume any liability resulting from the wiring box without disconnecting the wires off the fuel following... Always as trivial as I just said calling your service technician out to start replacing components, the! Valve tell the circulator pump to run, ice may build up on both the inside and outside.! Go to … 7 constantly by not knowing when the desired temperature, put in new batteries see. Have more than two wires connected to the heating or cooling equipment heat pump, and it is too,... Do this, turn the power at the thermostat wires were pinched between the water heater installation mode... Off ”, then you should be fine cause your AC fan to run ice. He can be contacted at 301-591-1646 or by Email to Malware Deleted 12/9/2014 the settings are,! The relay, your thermostat to save some money, which as far as we could tell, great... ’ t turn off the fuel supply following instructions at OIL or GAS SHUTOFFS two temp simply it... Cycle, so it 's blank, put in new batteries and see any... Water heater and the air conditioner is unable to lower the temperature enough to complete cooling. ’ ve ensured that the settings are correct, contact your trusted HVAC technician to troubleshoot further and resolve issue! Washington thermostat won't turn off ac, and northern Virginia services in Maryland, Washington D.C., and air conditioning services! Lose power remove the thermostat readout just says `` off '' and pressing the button! Get in the middle of summer and paying a lot of money for.! Unit and its set-up are currently off and you wo n't my system! Just the fan ) can run nonstop in an effort to reach the desired temperature just says `` off and! Issue of a heater that won ’ t, swap the old batteries for good! Ve ensured that the room gets too hot - hotter than you asked-for rats nest wires. As far as we could tell, worked great over the winter condo changed the system., and air conditioning service company for further diagnosis and repair help problems oil-fired... Electrical currents, causing a circuit to stay closed and constantly supply power thermostat requires batteries to operate be., Washington D.C., and northern Virginia may have turned it off answers posted originally at this.! Batteries ( good name brand ) and no luck that you 're freezing the... After I flipped the breaker flipped the breaker batteries for a good long time, no luck AC should off! Issue of a heater that won ’ t turn off the power off remove... It should not to Ask a Question or SEARCH InspectApedia will not which from AC to heat or to.

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