Sounds like a fault somewhere - save time and effort and get it fixed by a engineer. Progress to next rank: 25%. ... Cental heating comes on when timer is off! Older types of heating systems use a boiler that keeps water hot all the time. Timeswitches and programmers are both time … Help needed its red hot in here . Just get some reviews and quotes or save the time and effort and use the firm that I use called STL Heating. Now we've blown the thermal fuse again, 2 days ago, and I've had someone come and clean the vent in the wall out, which had a good bit of lint in it. With the ‘teeth’ on the dial pressed down the heat comes on and when left up the heat remains off. Re leaving heat on all the time vs intermittent heating: You say If you’re home is very well insulated, you are better off leaving the heating on at a set temperature, where the thermostat will work with the boiler to maintain the temperature relatively easily, since there is little heat loss occurring. Although, when the programmer is due to come on (at certain time) this still works and the boiler fires … Wow what a superb message board , right i believe i have the same problem has cez-raf yesterday i knocked the heating off on the timer so i could just have hot water but my central heating stays on !!! The heating does "work" and get hot otherwise. However, if your timer switches itself on and off sporadically – making the house too cold – it could actually be a faulty thermostat causing the problem. However, this is a dilemma faced by some homeowners as they seek to find a way of getting their boiler to turn off. However, in some cases when a boiler keeps firing up every few minutes and then quickly turns off again it could indicate a fault. This issue can be equally confusing and inconvenient as it could cause your household to become too warm, wasting energy and … Have central heating system controlled by Lifestyle LP522. It is still coming on the old times. Following all this, we now have a further little problem. Recently moved to an apartment with gas central heating (which I've never had before) and I'm cofused as to why the heating keeps clicking on, and the boiler keeps firing up. I have a Megaflow system with potterton profile boiler and Honeywell 9400 programmer.Up to now it was working fine .After draining the system to add fresh inhibitor , the central heating now only works when I turn on the hot water switch.The system was plumbed with separate motorised valve for hot water and separate for central heating,If I switch on the central heating … Hi there, First time posting so hope can be of assistance. I turned it all to holiday mode - it is still coming on the old times. If your furnace keeps turning on and off repeatedly, it can be stressful at best, and cold or downright uncomfortable at worst. I'm not complaining that the house is warm, but if … When we turn the heating off, it stays on for another couple of minutes, then we hear it click off - no problem. Any ideas? I know that the cylinder in the airing cupboard is very warm when the boiler is firing and cools down when I turn the boiler off. So, I've gotten another fuse but it's still heating without running and the timer … Oil central heating comes on at random times, even though the clock is set to OFF. They can also function without electric power for longer periods. I can turn radiators off manually. It may seem odd to want to stop your boiler from doing what it was designed to do. But then, even though the central heating has definitely clicked off, it takes quite a long time for the radiators to cool down - way longer than it did before. When your time control is on, if the room reaches the set temperature the thermostat will override the time control and turn off your heating. The heating is definitely off though as the radiators have gone cold. If your boiler doesn’t appear to be working or keeps switching on and off, there could be a problem with your timer or programmer. A timer or programmer allows you to control when your heating and hot water comes on and when it goes off. The problem I am experiencing, since setting up, is that when the heating switches off at the set off time… I amended the times a week or so ago as it is much warmer. http://www.thamesboilers.co.uk Update: I've moved house, so Just Central Heating is no more. It just seems that if the temperature falls below what I want it to be when the timer is on, the heating will come on even if its timed to be off… Some kind soul out there might help me with a Worcester 24cdi combi boiler work and. So ago as it is much warmer the times a week or so ago heating coming on when timer is off it much. Still randomly coming on are working 2 thermostat the Y plan valve was operating correctly, I that! 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