I turned the radiators and underfloor heating off for 4 days. I came back last night and there was an error message on the boiler F25 which is an over load of heat apparently. I have rebooted it a couple of times, it appears to start ok then it shuts itself off and the error message comes up again.
It is a glow worm ultracom sxi - many thanks
It is a glow worm ultracom sxi - many thanks