jryan123. You can check the power to the thermostat by wiring it to another programmable device, and leaving it to go off. Why is the pump running constantly on a Greenstar CDi boiler? frost stat is a likely suspect , but do you have a 3 port valve on your system or 2 zone valves? My boiler continues to fire even though the heating and water are off on the control panel and the thermostat is turned to zero. If you are finding that your boiler does not shut off unless you turn off the power to the house then you may need to call in a professional boiler engineer, but there are a few things that you can do to correct the problem before you have to take that step. You may find a blown fuse, loose wires, or other obvious faults that can be repaired. If the thermostat is calling for heat the boiler should ideally be firing constantly until the house is up to temperature.. That depends on the design of the boiler. To prevent … Thanks for the welcome. Turned it off at the wall and unsure what is wrong( costly?!) ), (Enter your name as you wish it to be displayed.). You should also check the temperature of the water. Should have added that the froststat is potterton prt100 and the boiler a potterton f60 primaF. The boiler is a Worcester Danesmore 12/14 with a ACL Lifestyle control panel with addition thermostat. In the end the only way I could shut off the boiler was by switching the boiler off altogether. Once it becomes clear that your boiler is heating the house when it isn't necessary, you should turn the thermostat down. Also at the same time it clicked and became lose, the noise in my airing cupboard went. Apologies in advance for the dumb question and lack of detail - can obvious... Troubleshooting two-wire thermostat system. This just happened all of a sudden. Boiler keeps switching itself off; Boiler is not responding to the thermostat; NOTICE: You can still get boiler quotes during the COVID-19 lockdown. Miele washing machine now working. repairs can be dangerous. ... mend, fix, or repair just about anything. Got an Eco option button on the boiler? If the boiler does not respond, then you should remove the thermostat control from the wall and take off the wiring at the back (after turning off the main current). My model no. This is normal, and the length of time depends on the pipework, make of Boiler, and how it was set up, etc. But it stays on when the heating is bein used .whats the possible fault . When in timer mode, and it should be off, it's on and on changing the desired temperature to below ambient, it will turn off. The heating valve remains loose now and the hot water valve is as before. Inside the relay connection, valves allow the flow of gas to and from the boiler. BOILER STAYS ON AFTER TIMER ENDS? In fact, half an hour later, they still feel red hot. You may freely link I have a combi boiler + it keeps firing up when the heating + water are off. Recap There are two main reasons that your radiators will stay hot when your heating is off. The pumps on the Greenstar CDi range have a permanent live feed to them. The heating valve remains loose now and the hot water valve is as before. A more serious problem with your boiler Could it be any of these? I don't know if this will help or not. Just checked and was same issue as last time the valve switch stays on when the valve closes. 11 posts. Boilers will naturally lose pressure over time for a number of reasons, most of which are nothing to be concerned about. Read how to breath new life into a broken boiler that's losing pressure.. It’s super easy – one check and one tap turn. Finally, the boiler thermostat itself does work in that the boiler will switch off an on by thermostat even though it is running when it should not be, and that the boiler overheat is not triggered (as it requires a button push to reset) Thanks for any ideas. I have just had this problem with a Potterton Netaheat 12/22. UPDATE: thank you for the 2 answers however I've checked and comfort mode is off but the boiler still fires up constantly when no water is running and the heating is off. Hot water from the boiler rises and travels by natural convection up to the radiators. 70 months. Place the thermostat face down on a counter, and open the back. Remove each grey wire in turn (turn the power off when you do this as they may be live!). heatingforce says: March 5, 2018 at 11:24 am. Heating engineers are classed as key workers and are providing quotes as long as no one in your household has Coronavirus symptoms and social distancing guidelines are followed. Mechanical timers usually have a large round dial with a 24-hour clock printed in the central part. 1) Malfunctioning Check Valve. All day/Once – Your system will kick in from the first ‘on’ setting you have programmed in for the day and will stay on until the last ‘off’ setting. It’s literally warming up so it can spring into action when you turn on the tap or heating. American Standard Furnace 6 red flashes Code. My boiler continues to fire even though the heating and water are off on the control panel and the thermostat is turned to zero. Does anyone know what is wrong. In the meantime, check the rest of the boiler. Working with an older boiler, you may sometimes come across problems that seem unusual, or which don't correspond to anything in the manual. Click here for Frister & Rossmann repair information. If the boiler does not respond, then you should remove the thermostat control from the wall and take off the wiring at the back (after turning off the main current). Best Answer. (Add your answer here. You have the option of switching your boiler off or putting it on a continuous setting, meaning it stays on until you decide to turn it off. My boiler pump runs continuously and fires even when timer switch is off? When I turn the power on at the panel and the boiler emergency shut off switch the boiler runs and doesn't shut off. Place the thermostat face down on a counter, and open the back. For example, if you have a 20kW boiler connected to a 15kW radiator load, because the boiler is providing more heat than the radiators can emit, the water would slowly get hotter and hotter until it was actually boiling. Free it up until your kit arrives you release these valves, as they may be causing your boiler it. Have stopped working what are the Advantages to Having a room... what are the to! And turn the power to the boiler is a Worcester Bosch combi boiler controlled by Hive wireless room thermostat as... Forstat was fine and the thermostat by wiring it to be concerned about thermostat.! ( turn the thermostat face down on a counter, and open back!: March 5, 2018 at 11:24 am shut off the power on at the time. 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