CFM 80 PG flame sensor testing

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cstoliker
Posts: 5
Joined: Sat Feb 26, 2011 10:19 pm

Thu Nov 17, 2011 6:26 pm

CFM 80 pg. I've tracked a problem to what I believe is a faulty flame sensor.(6622500) But on this unit the flame sensor is incorporated in the ignighter.

How does this work with just the two wires? Is there a way to test the flame sensor portion or bypass for diagnostic proposes?

When the furnace starts the wires leading to the ignighter read 110vac. The infighter glows, a few seconds latter the furnace ignights and the voltage drops to 0. Then in a few seconds or up to a min the furnace shuts off the gas valve and startes the start up process all over.


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