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  1. Replies
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    817

    Listen carefully and watch the burn window...

    Listen carefully and watch the burn window before/while the heater shuts off. A knocking sound will indicate not getting fuel, if the flame looks good and it shuts off you likely have a flame rod/...
  2. Replies
    6
    Views
    817

    Usually when this happens with my 422 it's...

    Usually when this happens with my 422 it's because the flame rod has come in contact with the flame ring or soot has bridged between the flame rod and flame ring. If the flame ring is mushroomed or...
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