3 LAN Drive Suite #100 If the unit doesn’t turn off then you may need to cut power to the whole system. 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. Even when you shut off the heat at the programmable thermostat the boiler keeps running. Replacing my old Thermostat with a Honeywell DT90E - Thermostat not Switching off by pge » Sat Jan 02, 2016 9:07 am Last post by pge Sat Jan 02, 2016 9:07 am 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? Heat Won't Turn OFF: troubleshoot the thermostat4 Steps to take if the heating system won't turn off First Step: Change the thermostat setting up or down. It got so annoying that I decided to turn the wall thermostat controls to 'off' but it still does it. Status Not open for further replies. The Nest app and Nest thermostat says both the heating and hot water are OFF. This is another ‘silly’ thing that can cause your thermostat to go blank.  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. Nest turned "off" the heat after the temperature came up. But in multi-zoned heating systems there may be multiple hot water zone valves or multiple air duct zone dampers. Or see THERMOSTAT WON'T TURN OFF FAQs - questions & answers posted originally at this page. If the cooling system wont' turn OFF, that is if cool air keeps being delivered even when you don't want it, we do the opposite: set the thermostat to its highest temperature, or if your thermostat has a HEAT OFF COOL or FAN AUTO OFF control, set the control to OFF or HEAT. Was the heating on in the middle of the night? ©2020 Hearst UK is the trading name of the National Magazine Company Ltd, 30 Panton Street, Leicester Square, London, SW1Y 4AJ. My thermostat display is orange and says it's heating to the set temperature, but furnace isn't kicking on.  Domestic Central Heating Wiring Systems and Controls, 2d Ed., Raymond Ward, Newnes, ISBN-10: 0750664363, ISBN-13: 978-0750664363, Quoting from Amazon.com:  Proliphix Corporate Headquarters [Website: proliphix.com] , 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. 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. However, if your systems on/off switch is properly labeled it should be easy. Step 2: confirm that the problem is in the thermostat or its wiring. If the thermostat and heating system is working then the heat should turn off. Mine is programmed opt come on when it drops to a certain temperature. I would be … scales. 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. The batteries serve 2 purposes. Step 3 Move the tab on the switch labeled cooling, heating and off to the … 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. You should see a switch for the blower, which allows for either automatic or manual operation. But no matter what temp it's set on, when you turn it on the heat will just run and run. 1. 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. Having an on and off issue over the last 3 weeks. :help:I have a two zone Smith GB100W gas boiler that still runs after the thermostat has reached the desired temp. If the air handler, blower unit, or fan won't stop. 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. It was … He can be contacted at 301-591-1646 or by Email to Malware Deleted 12/9/2014. Thanks to reader " Box 53138 If the thermostat requires batteries to operate, be sure that it has new fresh batteries installed. 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. Multi-zoned heating systems may mean you have to follow the individual thermostat's wires to find just which control they operate. Inside temp is 20deg. The Energy Saving Trust says that every degree you turn down the thermostat will save you £80 on your annual bill. 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. Ph: 905-223-5567 Fax: 905-223-3778 In other words, you say that the room gets too hot - hotter than you asked-for. Turn Off Electrical Power to the Heating or Cooling Equipment. Registered in England. (It's also only six years old.) My traditional honeywell simple dial-type thermostat on the wall has two pointers and two temp. Watch out: Don't cycle heating or cooling equipment ON and OFF rapidly using the electrical power switch or any other control. But in just about every case, just two wires are actually being used to turn the heater, air conditioner, or heat pump ON or OFF. 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. The heat will go off when I turn it to off. Hi All, Just moved in to a new house and trying to work out the central heating system which is currently beating me! ), 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. Hi i have an ideal classic se12 ff and when the hot water is on … Tado … If your heat won't turn off and your thermostat is operating properly (quick check, disconnect it from the wall or take the batteries out) then most likely your valve(s) is/are stuck on. Disconnect the thermostat from the heating or cooling system - at the heating or cooling equipment. THERMOSTAT WON'T TURN OFF at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. The heater does not stop running, the thermostat does not seem to make any difference where it is set. - Jeannette 1/23/2013. And what was the temperature last night? I assumed that it must be to do with the hot water instead of the heating however then noticed in the manual that I can actually change the boiler itself to 'heating off' so tried this and it now doesn't fire up, unless I'm running hot water...which is I assume what it should be doing. Or if your thermostat has a HEAT OFF COOL or FAN AUTO OFF control, set the control to OFF or COOL. Step 1 Lift the cover on the programmable thermostat. However I have to set it on 60 degrees to get heat temp to 70 degrees. Were squished wires the cause of a temporary short and will the wires keep working if they are undisturbed? If you’d like to join in, please sign in or register. 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. What temperature should you set the thermostat to? But it should go without saying that the lower the temperature on your thermostat, the less your heating bill will be. at BLOWER FAN CONTINUOUS OPERATION) for now, to diagnose the problem make sure that both of these switches are set to FAN OFF. What can I do? But at 3 AM I woke up to all the radiators lightning hot and the Nest reporting that the heating was turned off. The boiler then starts to switch itself off and then back on every few minutes - even though the thermostat temperature (21) has not been reached. 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. After I loosened the safety straps and freed the wire, the thermostat works. The Erie zone valves could close against 23 ft. We had a 4-gpm bypass installed in the distribution piping, but on mild days with only a few zones calling for heat, the circulators still operated high on the left end of their curve and were forcing up to maybe 15 gpm through zones that supposedly were shut off. (I reset the furnace). TADO, your support is awful. Apologies for the delay. Using your thermostat manual (and making sure the power is turned off) you can check the connections of your thermostat's terminals and wires. Next Last. Help in sorting out thermostat wires is provided in our articles starting. Here are some things that would cause that problem: Our furnace thermostat failed after an adjacent water heater installation. Why Your Heating System Thermostat Set at 68, Won't Heat Above 65. I selected the heating on the Nest to the 'Off' position and the boiler was still going, tried selecting 'Eco' and no change. Increase the set point a few degrees above the room temperature. Start new thread in this topic | Watch this thread | Flip this thread | Refresh the display Add a message; This is page 1 of 1 (This thread has 5 messages.) The batteries … The most modern heating systems have room thermostats and hot water cylinder thermostats. If your thermostat is not totally level, the mercury switch within it can cause the temperature … 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. jenni75 Sun 28-Aug-11 17:54:39. 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. If your heating system still does not turn on, follow the steps below to determine if the issue is related to the thermostat. Even when a thermostat is controlled wirelessly by a smartphone, has sophisticated programming to automatically shut on and off, or is controlled wirelessly by a smartphone, the principles are still the same: Low-voltage wires inside the thermostat send control signals to the furnace through small-gauge wires when the thermostat's inner mechanism senses the room temperature has moved outside the … The first being to power the display so that you see the current settings on the stat and to just them accordingly. Also I know something is on as the gas meter is running furiously! Reply to Thermostat turns heating off downstairs but still comes on upstairs in the Central Heating Forum area at PlumbersForums.net. 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. So, in order to prevent the air conditioner or furnace from kicking on unnecessarily, you should turn off the programmable thermostat. System uses a Worcester CDI 30 Boiler which provides instant hot water so no hot water tank. I can turn off the Thermostat and the Trane keeps on running. When the boiler comes on in the morning, the radiators het hot and the temperature quickly reaches 20 degrees (one degree lower than that set on thermostat). Remove the 2 AA alkaline batteries and … 10 Royal Orchard Blvd. … It was working fine until my condo changed the air/heating system this summer. If the check valve fails because of a broken spring or some debris, your radiators will be hot from the natural convection, even if the heat is not “on.” 2) Diverter Problems. Well when i got up in the middle of the night it was about 12c in the house. http://www.lovekin.net/honeywell-motorised-valve-faults.html. Typically the two thermostat wires are red and white and are connected in the controller to terminals T1 and T2. or a FAN LIMIT SWITCH for warm air heat (furnaces). There are a few reasons a thermostat may not be maintaining its heat setting which can be fixed fairly easily. The display on the Nest Thermostat was showing the target temperature of 9'C and the background colour on the Nest display was black (ie no call for heat). Turn off the fuel supply following instructions at OIL or GAS SHUTOFFS. Westford, MA 01886 Cut the power to the heating system: Many homeowners feel uncomfortable with this step. Also; don't rely too much on the scale on the dial. 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. 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. InspectAPedia tolerates no conflicts of interest. My landlords boiler is on, and her heat is set to 65. Some of the controls discussed in detail here include the, V155A = Series 10, V435A = Series 40, V575A = Series 50, V835A = Series 80,  Trane TCONT800 Series Touch Screen Programmable Comfort Control Ownes Guide, American Standard, Inc., Troup Highway, Tyler TX 75711, January 2005, Telephone: Customer Service: 1-877-3381, website: www.trane.com, "Residential Hydronic (circulating hot water) Heating Systems", Instructional Technologies Institute, Inc., 145 "D" Grassy Plain St., Bethel, CT 06801 800/227-1663 [home inspection training material] 1987, "Warm Air Heating Systems". If the problem still occurs, you can go through the process of checking your thermostat’s calibration. 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. 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. Here we discuss how to diagnose & fix a thermostat that keeps calling for heating or cooling when it should not. Any suggestions - never happened before in 7 1/2 yrs Hi, My thermostat is off, and last night I noticed that there was heat circulating through the baseboards. Similar threads. Is there a frost thermostat fitted? Had my heating/cooling company out to look, but by then it was heating properly and they couldn't find what would cause this and said furnace is fine. (Excellent tips on spotting problems on oil-fired heating equipment. see THERMOSTAT SWITCHES, EXTERNAL. Discuss Thermostat turns heating off downstairs but still comes on upstairs in the Central Heating Forum area at PlumbersForums.net. It came on this morning. I had a similar problem with my Worcester Bosch boiler . Have turned thermostat right down - as normal, but the heating is still coming on. [fa icon="calendar"] March 05, 2018 / by Home Services Expert. I don't know if it's related but all of the graphs for all the thermostats show a flat line today. I checked the radiators and they seem to be cold. Some room thermostats include a "safe" mode that will call for heating at a pre-set temperature should the system lose power. 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. 1; 2; Next. With most types, you just pull it straight out, but check your manufacturer’s... 3 Use a soft brush or vacuum with a brush attachment to gently and carefully remove dust and dirt. K. Kimberley_125. Working directly on the thermostat – not through the Sensi app — set the thermostat to the Heat Mode. If the temperature drops below that it will still come on. They came out last week and changed the controller but the problem seems to be still there as the boiler seems to have kicked on as I write this post! DIGITAL SPY, PART OF THE HEARST UK ENTERTAINMENT NETWORK. And if the cooling system air handler, blower unit, or fan won't stop, also,  Thanks to reader S.R. If after you’ve checked your calibration and still see problems we recommend calling a professional. Continue reading at HEAT WON'T TURN OFF or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. × Radiators hot when central heating off and thermostat at 0 (5 Posts) Add message | Report. Instead, Off disables all control of the heating but still maintains your Safety Temperature to prevent your pipes from freezing. I am wondering whether it is the Honeywell aquastat controller.I have model L4080b on the boiler. 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. 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. Room gets too hot - hotter than you asked-for gets too hot - hotter than asked-for! Originally at this website services in Maryland, Washington D.C., and conditioning. 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