Have a Hydro flame 8940-111 that at times upon startup the fan will come on and then the gas will ignite. After 5 seconds the gas goes off for about 10 seconds then it ignites again for about 5 seconds then the gas goes off again for about 10 seconds. It then relights for 5 seconds and the gas shutoff valve takes over and shuts off the gas for the rest of the cycle. Recycling the therm will produce the same results. Pulled off the outside cover and checked the connections to the board and the furnace ran as it should. This first happened back in Sept when we wanted to take the chill off. Moved to a dryer and warmer area and the furnace worked fine until this morning when it did the light, go out, relight thing again. Tonight it is working just fine
Since the humidity was high this morning, as it was back in Sept, was wondering if this could be possibly be caused by a cracked circuit on the board getting moisture in it? Do I need to replace the board or is there some other cause?
Mor Dearg 1999 Volvo VNL 610 Cummins N14 with super10. 2001 35' Alfa Ideal.