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  1. Chris04626

    Chris04626 Minister of Fire

    Joined:
    Sep 19, 2008
    Messages:
    506
    Loc:
    Maine
    I have very dark smoke coming from my exaust pipe outside, the boielr is running and not in start up mode/

    Harman Pb105? THoughts?

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  2. AndrewChurchill

    AndrewChurchill Minister of Fire

    Joined:
    Mar 31, 2008
    Messages:
    668
    Loc:
    Vermont
    I would guess you're not getting enough air. Possible things to check are:

    The air intake flapper. Make certain it's not stuck closed.

    Check that all the doors are closed tight. If air is leaking from around those doors it is bypassing the burnpot and you will not have good combustion.

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