If anyone can help, it would be much appreciated. The pump runs ,the fan runs,the pressure switch is made and thats when things start going pear shaped. No spark at electrode,there's gas at the inlet of the gas valve but nothing at the outlet. I'am not sure if it's the pcb ??? could anyone shed any light on it please?

mike, March 2012

Clean carbon build up on Electrode with fine paper or replace it

ltd, March 2012