It will only ignite when you tap the gas valve assembly, specifically next to the solenoid switch I believe. The igniter lights the pilot, and then it must be tapped. Thanks! It is a Richmond powervent with a robertshaw valve. I am wondering how to check the parts with multimeter
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Favorite Answer
If the ignitor is working it is probably not an
electrical problem. If your heater is oldenough to beout of warrenty you could try calling the munufacturere and see if they have some suggestions. If the heater is real old you may think about repalcing it if not you might just need to replace the valve assembly.
Pat F85
If your model has a flame sensor, and you can get to it, try cleaning that, with steel wool, or emery paper.