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Have a goodman furnace that is acting like the flame rod is bad. Changed the flame rod and it's doing the same thing. Fires up for 3 to 20 seconds then shuts back down. All wire connections are good, has a good groung, all rollout and limit switches stay closed. Preesure switch stays closed. Thinking it's the circuit board, any other suggestions?

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  • cupton68 Sep 19, 2008

    Just happened. Was working fine last winter

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Did this just happen and did you change any parts?

Posted on Sep 19, 2008

  • ralph jones Sep 19, 2008

    remove the ground screw and sand where it attaches . sometimes it dose not make a good ground.Verify with a VOM the power going to the module and check all grounds for the circut board.the flame rod picks up ground through the flame , make sure the rod is clean and the flame is blue not yellow tipped.

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