CFM 80 PG flame sensor testing

Questions about repairs and parts for Nordyne furnaces, air conditioners and heat pumps for manufactured homes including Intertherm, Mac and Miller brands. Click here for Nordyne parts.

Moderators: Mark, Greg

Posts: 5
Joined: Sat Feb 26, 2011 10:19 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.