Thanks, if I have only the central heating on, this does not come on , evrn if roomstat fires. Is it possible the plumber may wired the new 3 way incorrectly ? As there is a Honeywell connector box in the location of the hot water tank, to which the 3 way valve is wired, along with the...
The boiler is only heating water to the radiators when the hot water is being heated . I have changed the motorised 3 way valve, with no change ? could it be the roomstat or the programmer. The roomstat does make that click at low temperatures but does not fire the boiler. Does anyone...