boiler works fine on heating and hot water for a while then goes to fault indicating flame and fan/flue. struggles to start again,fan spins then stops over again. keep resetting until it starts. have checked the flue and venturi for blockage nothing, also replaced the air pressure switch but fault still occurs. not sure if its the pcb. any ideas?

ben p, March 2010

get someone who know what they are doing and is rgi your just chucking parts at it and guessing.

hi-spec plumbing & heating (essex), March 2010