The pilot lights, its continues to spark then the main burner lights then the main burner goes out after a few seconds but the pilot stays lit then the main burner relights again and the cycle continues over and over. This happens whether its trying to heat the hot water, central heating or both. So far, a corgi engineer has replaced the air pressure switch, pilot assembly, fan, gas valve and PCB but the problem continues. What else could it be?

Clare, September 2007

air venture blocked

and, January 2008

not worked on the 40 ff but it it could be the flame rectification lead or probe that require attention

alan, September 2007

air pressure switch, pilot assembly, fan has done its job if pilot is alight must be pcb or gas valve. asol check eletric polarity

kris, September 2007