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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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1 Answer

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3 Answers


I suspect that the flame is not traveling to all the burners within a given time so the flame sensor is shuting down the gas valve. Clean out the flame rail where the flame travels and carefully brush off the flame rod with an old tooth brush.

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1 Answer

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The first thing to look at is the flame sense rod.
Shut off power to the furnace, remove, clean sensor with steel wool or sandpaper then reinstall the sensor. Reapply power and it should run properly.

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1 Answer

Furance lights and goes out after ten seconds does this three times.bought a new flame sensor worked two days same thing again.goodman furnace

If it isnt the flame sensor make sure the furnace ground wire is hooked up.If the ground is bad it cant sense flame.

Oct 20, 2008 | Goodman Heating & Cooling

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