Hi pete i am newly qualifid. I think i have worked it out if the ch valve has
gone to an open circuit it would then power up the boiler is that correct Gary
I am working on a potterton prima f boiler with 2 x 2 port danfoss valves I am not sure which make of programmer the problem I have got is the boiler works fine on hot water when calling for demand but on the heating side there is no control the room stat is on 0 the programmer is is off and I...