Hi.
i have a combination boiler. When i switch it to hot water and turn the
tap on, the boiler does not fire up. If i switch boiler to hot water
and heating then the boiler will fire up. if i turn the thermostate
control for the heating down to 0 (which is in the dinning room)then
the boiler will cut out. So that leaves me with the problem of i cannot
have hot water unless i have the heating on as well. Could someone
please help and tell me why they think the boiler does not fire up on
the hot water switch and why it cuts out on the hot water/heating switch

Hi

Had this problem a while back. The diverter valve had stuck. Even though I
had inhibiter in the system. Had to have the system flushed and a new
valve. Solved the problem.

Rob

thanks