codyt
0
danpik said:That is a pretty low reading. Make sure the thermopile is in the pilot flame real good and you have a strong flame. Also make sure there is no corrosion on the leads which would give a low reading as well. If all that is good then I would suspect the powerpile to be weak. I have pulled them out before and tested them in the burner on my gas stove to be sure. Idealy you should see 750 Mv if it is good. They will range a bit above or below that number... 600-800 out of the box.
I installed a new thermopile, lit the pilot, turned the heater switch to on, and the heater fired right up. My new thermopile is only getting about 520 mV, but it's working fine for me.