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Hi we are having problem again with ideal isar.When the boiler is cold we can run hot water. When the central heating is on and we put the hot tap on the heating stops working and no water is being heated and H2 starts flashing.Then we have to wait for it to cool down before we can use either...

hi, came home today to find boiler not working .no power at all.checked all wires and fuses,all live and working upto pcb.there does look to be a very slight warp in the black plastic of the pcb as if it might of got hot.does this sound as if the pcb unit has gone.if so can anyone tell me the...