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Thread: Miller 330A/BP

  1. #1
    Join Date
    Sep 2013
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    Miller 330A/BP

    Have had my old 330A for over 25 years (and it was old when I got it!) and this is the first problem I've ever had with it. As soon as I turn it on (in TIG mode) the torch is on and will not shut off without actually turning the machine off. I tried disconnecting the remote (foot pedal) and same thing. A relay stuck? Also, one of the capacitors is leaking what looks like tree sap. The capacitor's Miller part number (made by SANGAMO) is 31-602.
    Would really appreciate any useful input.
    Thanks in advance

  2. #2
    Join Date
    May 2010
    Sparks, NV
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    Re: Miller 330A/BP

    Check the main contactor under the lower left side did not stick or weld it's contacts together

    Sent w/ Tapatalk using Swype, pls excuse typos
    Last edited by soutthpaw; 09-24-2013 at 08:55 PM.
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  3. #3
    Join Date
    Jun 2012
    Big Lake/Monticello MN
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    Re: Miller 330A/BP

    If you needed it, get the tech manual here:

    Good luck

    Dave J.
    Dave J.

    Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

    Syncro 350
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    Tried being normal once, didn't take....I think it was a Tuesday.

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