Was the heating on in the middle of the night? Answer / Solution. Thermostat Does Not Control Temperature. Why your thermostat goes blank then comes back on. JavaScript is disabled. I am monitoring it for the nct two weeks and then the plumber comes back to power flush again, change the diverter and clean out mega filter. Well when i got up in the middle of the night it was about 12c in the house. Your blower should run constantly until the heating cycle ends. turn it off when heater is running .if heater goes off then thermostat is faulty. Need help replacing my kitchen tap please. DT90E, CM707, noise, loud click, THR840UK, T4 wired, CM907, CM901. However, according to research, a lot of us make some costly mistakes when it comes to using our programmable thermostat. if you turn the preheat off that may solve the problem, if you switch the boiler off and its cold and the preheat is off the boiler should not come on for heating, there could be an issue with the diverter valve maybe if the heating is coming on with the preheat is switched on, It sounds like the diverter valve could be letting by and if the preheat is constantly on demand it will heat the rads up ,if that makes sense. Ask Question Asked 3 years, 2 months ago. Sometimes heating or cooling systems can behave strangely. Most heating systems are setup to automatically turn on and off based upon the setting of a thermostat. Hi i have an ideal classic se12 ff and when the hot water is on and the central heating is off and thermostat in the room is set to 0 the radiators are hot. Before the summer, I bought a house with baseboard heaters in each room, individually controlled by its own thermostat in each room. Also; don't rely too much on the scale on the dial. Will not cycle off unless I remove power to the entire HVAC unit. Any help would be appreciated. And when it is not functioning properly, it may cause your furnace to cycle on and off more frequently than is necessary. They deserved prompt attention, so I was on my way immediately. This. For a better experience, please enable JavaScript in your browser before proceeding. I've had to turn off the heating at the boiler as we're cooking. It just won't turn off properly, without the ridiculous playing around described above. Over the last few days it's decided to come on at night for no reason. You may also have a problem if your thermostat is clicking but your air conditioner or heater is not turning on. It has gone a day without coming on (thermo off the wall the entire time) then just cycles itself on. So, if your furnace keeps turning off and on too quickly, your thermostat might be malfunctioning or broken. This device, called a heat anticipator, tells the thermostat when to turn off the furnace burners. Heating 24/7 is very expensive (it's why no one in Europe does it and why programmable thermostats were invented). Here are the main terms you should know: Room thermostat. Types of thermostat. Registered in England. You may have come across many different types of thermostat, but you may not know the difference between each. 1 of 2 Go to page. Next Last. Welcome to the Digital Spy forums. You can set the on and off times for every day of the week. Heat. As I mentioned above in this article, There are several reasons why your Honeywell thermostat keeps turning off and on. Yep. Discussion in 'Plumbing and Central Heating' started by Klaus_K, 4 Sep 2010. 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. It got so annoying that I decided to turn the wall thermostat controls to 'off' but it still does it. Heating comes on when thermostat is off - Gas Work job in Bournemouth, Dorset Location. Either the room thermostat or the water cylinder thermostat calls for heat when the boiler turns on. If so, if the temperature drops below the setting of the frost thermostat this will generally over ride all other settings. Mine is programmed opt come on when it drops to a certain temperature. If you’d like to join in, please sign in or register. If your Honeywell thermostat isn't working properly, it's worth checking behind the cover and giving it … Status Not open for further replies. If this were the case, air would not be blowing over your heat exchangers, and your furnace would be going off on High-Limit, just as with step 1. My TRANE XE 90 blower fan has a mind of its own. Until it doesn't - which could be an hour or a day. It will turn just enough to turn the valve a few degrees. I Pre-heating HEATING IN THERMOSTAT. Is this a problem with the unit, or the thermostat inside the house? Radiators running hot even when thermostat is off. There are several things that could be causing your thermostat to not work properly. K. kirky76. is it the greenstar 30cdi or the old one with the grey bottom panel? And when it cools down then it gets On automatically and starts maintaining … Of course, all thermostats have been off during the summer. Gas Work Posted. The main bedroom comes on randomly and just keeps heating and heating and never shuts off. Hot radiators remain when heating goes off - maybe from hot water storage cylinder ? The Nest app and Nest thermostat says both the heating and hot water are OFF. 0 0 rapid On Friday it was on water. Bournemouth Trade . 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