My Halstead combi 82 boiler was working fine on Sunday night,turned it off went to bed tried to turn on monday morning all i got was power on light.I opened the case and refered to the user manual found there was power in but no power reaching the pump terminals.In the user manual it says if this happens replace the pcb board,i did this [very expensive].no good just the same no c/h or hot water,anyone got any ideas?