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Thread: Miller 330A/BP

  1. #1
    Join Date
    Apr 2011
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    Miller 330A/BP

    Have Miller 330A, Has been working fine for years and it suddenly stopped welding in middle amp setting. (doesen't work in low settings either) Will start arc but amperage is low and foot control has no effect. Switch to high setting and seems to work fine. Any help with what to check appreciated.
    thanks Roger

  2. #2
    Join Date
    Dec 2010
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    SoCal-LA
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    Re: Miller 330A/BP

    Quote Originally Posted by corncob View Post
    Have Miller 330A, Has been working fine for years and it suddenly stopped welding in middle amp setting. (doesen't work in low settings either) Will start arc but amperage is low and foot control has no effect. Switch to high setting and seems to work fine. Any help with what to check appreciated.
    thanks Roger
    First thing I would check then is your High/Low selector switch, and all connections leading to it. Also foot controls don't last forever.
    Weld like a "WELDOR", not a wel-"DERR"
    MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.

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