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munchkin f-18 code

I have a Munchkin 199m series 2 the faults out on a gas valve code. The control board is a 925 controller, the gas valve has been replaced with the wiring harness. New flame sensor and ignitor. Good condensate drain. It still faults out.
Any clues?
Thanks Haventseenenough


  • wogpa67
    wogpa67 Member Posts: 238
    Only thing on the flowchart you haven't done is the control board.
  • Tim McElwain
    Tim McElwain Member Posts: 4,628
    When was the last time it was cleaned and a combustion test done? I would also monitor voltage to see if you are getting any drop in voltage that would answer the control board issue. The 926 board has a beefed up transformer.
  • AlCorelliNY
    AlCorelliNY Member Posts: 63
    Check for good solid grounding.
    Al Corelli