Hi Jeremy,

Powermax can have too much pressure at times but not to the extend that prevents start-up. Once the solenoid is frozen from gas pressure, it may take a bit of time to return to normal stage. Try by-passing the solenoid. Connect the gas direct and go thru the start sequence, slowly turn on the gas while the "G" is showing on the GDT and see if you get any ignition. This will isolate the potential problem with solenoid valve.

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Regards,
Kraivuth S.