Staff Answer
Sep 28, 2026 - 07:36 AM
An F code after a few hours on LP means the flame went out and it couldn't relight. Since changing tanks didn't help, check the burner and orifice for debris, brush out the flue, and make sure the electrode is clean and sitting in the flame. A regulator that loses pressure over time can also cause this, so have the LP pressure checked if the rest looks good.
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