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  1. 03-08-2009, 05:50 PM #1
    Ehart
    Ehart is offline New Guest
    Join Date
    Mar 2009
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    1

    Vermont Castings Direct Vent Insert

    A little over 3 years ago we had a model LHERDV30 installed in our fireplace. Within 2 weeks we noticed a 3/4 black circle in the lower left hand corner of the glass. Service people came out several times and rearranged the logs and still the circle remains. Seals have been checked and the installation around the fireplace chimney has been looked at. Does anyone out there have any idea what might be causing this circle and how can I get it to go away permanently? Thank you for your help.
    Last edited by Ehart; 03-09-2009 at 02:31 PM.
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  2. 03-08-2009, 11:15 PM #2
    jtp10181
    jtp10181 is offline Regular Guest
    Join Date
    May 2005
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    Madison, WI
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    1,078
    The two things that most often cause soot is the wrong sir shutter setting (fuel / air mix) or flame impingement. LP gas is more sensitive to this.
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