hi iam gas safe reg but not part p and dont often get involved with repair have a micron firing for 5 seconds then into reset boiler already had new pc board 3yrs ago but oni inspection looks like some water may have come through flue or he micron 30ff can u help and is it an easy job 2re install new pc boardn

matt, August 2010

pcb is easy to change, check the drain screw on the rhs of the heat exchanger to make sure it isn't leaking.

Ian, August 2010