Hi, unfortunately I have a glow worm micron 50ff, the pcb and thermistor have both been replaced together but i still have no ignition. It sounds like it is trying to spark and i can smell gas out of the flue when the fan runs. The fan runs and stops three times then I have a sequence of ignition lockout 8hz. Any ideas where to go with this problem now ? Appreciate any help. Thanks. Simon.