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Harmon stove pulsating?

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by ChuckT, Oct 24, 2008.

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  1. ChuckT

    ChuckT New Member

    Joined:
    Oct 24, 2008
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    Loc:
    Hartford, CT
    Cool site! Never knew this exsisted.

    So I've had my Harmon 25th Anniversery stove for two years now and I love it. Lately its been acting funny though. When its running, it has this pulsating sound coming from it. I mean when there is a nice flame going, the flame will start pulsating. Doesnt do it all the time, but its annoying. The dealer asked if the air intake was blocked and no it isnt, then he asked the usual "is it clean" and yes its very clean. I am a machine technician by trade so I have a pretty good skill level. (at least I would like to believe so). Any thoughts on this? The intake door stays open the entire time its running, I figured it may be bouncing closed causing the dancing flame.

    Any thoughts? Oh by the way the window also gets black real quick also leading me to believe its not getting air.

    Thanks for any help!!

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  2. humpin iron

    humpin iron Feeling the Heat

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    Apr 16, 2008
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    Loc:
    Northeast
    are you burning a new type of pellet? New to u? sounds like too much fuel in the burn pot
  3. ChuckT

    ChuckT New Member

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    Oct 24, 2008
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    Loc:
    Hartford, CT
    na, same type of pellets i've always burned. Still kinda wierd, when the stove drops the flame level it works fine. When its got a big flame thats when I notice the pulsating sound the most.
  4. swalz

    swalz Feeling the Heat

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    Loc:
    Newark, DE
    If you find out what it is let me know; mine has been doing the same thing since installed. The dealer is no real help on the problem and it never seems to act up when they are out. This year it is not as bad as last year but I have only been burning for a couple of weeks and mostly at night. When you open the feed hopper door does it really get loud when it is happening?
  5. tinkabranc

    tinkabranc Minister of Fire

    Joined:
    Oct 23, 2007
    Messages:
    1,640
    Loc:
    South Coast MA
    My stove has a low rumble every once in a great while like it is
    starving for air but it usually only lasts for a minute or two.
    Every time it happens I find there are holes in the burnpot
    clogged up.
  6. ChuckT

    ChuckT New Member

    Joined:
    Oct 24, 2008
    Messages:
    4
    Loc:
    Hartford, CT
    Great both of you have XXV's. I was also thinking about the holes in the burnpot being clogged up since, correct me if I'm wrong, that is where the fresh comes through?

    When I first got the stove, the window would only get a light soot at the top of it. Now it seems like it gets really black at the bottom of it. The dealer told me that it was a lack of air getting into the stove. Do you think its a related issue?
  7. GVA

    GVA Minister of Fire

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    Waxhaw, NC... Formerly North shore Mass
  8. richg

    richg Minister of Fire

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    Nov 20, 2005
    Messages:
    886
    My P61A was doing the same thing. I replaced the door gasket and it seems to be fixed. No amount of adjusting the draft screw, cleaning, changing vent configuration etc had any effect.
  9. ChuckT

    ChuckT New Member

    Joined:
    Oct 24, 2008
    Messages:
    4
    Loc:
    Hartford, CT
    I was starting to question the door gasket also. It almost looked as though it was below the sealing surface in one particular spot.
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