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Continuity with and without light.
I actually removed I from unit and just checked to see if there was a continuity change with and without light source. I did not check it while operating. The unit is similar to a push and twist light bulb, so it would be difficult to access the contacts while operating, also it is on the bottom of the transformer so that would need to be open to access it.
I have 380 to 450 ohms across F F (they are actually wire ties not terminals) when operating. ohms when idle was spiking hi to low, so not sure what that is. The fuel tank is above the burner so I should not have drain back. I did notice on first start up the motor sounded like it was working hard for a couple seconds.
No it tried firing again shortley after I was testing it and it failed.
Do you have any schematics/instructions for this proccess?
I understand, what should the pressure be?
No problem, thanks for your help.