if you dont know how to check each component operation during the ignition sequence then call an engineer, it could be a slow fan, damaged tubes to the air pressure switch, the actual air pressure switch, the ignition lead, the spark electrode or pcb, or case seal to name only some of the possibilities. if it is the pcb or fan then british gas 192 pound fixed repair fee is good value. but if its a tube or lead its a bit much, you will pay the same either way
john, February 2010
