i have just done aminor repair on the heat exchanger turned off gas and water on the boiler itself put it all back turned every thing back on now i cant get it to light ihave not interfered with pressures or anything like that as iwouldnt be confident
BEFORE GOING TO IGNITION THE PCB WILL CHECK THE FAN IS WORKING VIA AIR PRESURE SWITCH ARE TUBES ON CORRECTLEY - TO - + TO + AND THE WIRES TO AIR PRESURE SWITCH IF IT IS NOT SPARKING AT BURNER THEN THERE IS A PROBLEM BEFORE IT TRYS TO GO TO IGNITION