I have the following irritating issue with my boiler:
Even with the thermostat set to minium (zero) and the timer off, the boiler springs to life, every 10 minutes or so!! And all through the night.
The boiler heats the radiators & hot water ok but it seems to have a mind of its own.
The first sign of trouble happened when the radiators remained on and wouldn't cool or go off, even though the thermostat and timer were off. An engineer attended and reset the boiler. Now the boiler just seems to come on/off randomly. I have tried pressing the reset button on the front but this didn't seem to do anything, I have also power cycled the unit. The boilers status is "c" and remains flashing "c".
I suspect the timer or thermostat is on the blink??
Any advice greatly appreciated.