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Thread: Hobart handler 135 won't shut off

  1. #1
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    Sep 2020
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    Hobart handler 135 won't shut off

    Hi everyone,
    My little 135 is such a reliable machine it decided not to stop welding! I was using it last night for some short beads and when I finished one and released the trigger I noticed that the gas didn't stop flowing. Then I also realized that the gun was still energized. The wire had stopped feeding, though. So I shut the regulator and flipped the off switch and still heard a humming noise! Finally unplugged it to get it to stop. I'm guessing I have a sticking relay or something like that. Any ideas?
    Thanks
    Glen

    Hobart Champion 16
    Hobart Handler 135
    Miller XMT 304 CC/CV
    Hobart Hefty CC/CV
    Lotos LTP5000D

    If all else fails, try some super glue

  2. #2
    Join Date
    Apr 2009
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    Re: Hobart handler 135 won't shut off

    Either that or trigger sticking. Just throwing that in.

  3. #3
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    Re: Hobart handler 135 won't shut off

    The wire does stop feeding when I release the trigger so I think that's ok. Guess I'm gonna be a welder surgeon this afternoon.

  4. #4
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    Re: Hobart handler 135 won't shut off

    Took the cover off and blew out all the dust and junk from the last umpteen years. Lightly tapped on the relay and now it's working normally. I'm guessing the relay is at the end of it's life cycle. Probably should order a new one so I'll have it on hand when it finally dies.

  5. #5
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    Re: Hobart handler 135 won't shut off

    You might consider spraying some electronic contact cleaner in the relay if it's not a sealed one. If it's sticking and/or slightly corroded that may help.

  6. #6
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    Re: Hobart handler 135 won't shut off

    Good idea. I'll try that if (when) it happens again.

  7. #7
    Join Date
    Mar 2018
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    Re: Hobart handler 135 won't shut off

    Just kill it like they did old West
    Take out the 6 shooter.

    Dave

    Quote Originally Posted by ArcTan View Post
    Hi everyone,
    My little 135 is such a reliable machine it decided not to stop welding! I was using it last night for some short beads and when I finished one and released the trigger I noticed that the gas didn't stop flowing. Then I also realized that the gun was still energized. The wire had stopped feeding, though. So I shut the regulator and flipped the off switch and still heard a humming noise! Finally unplugged it to get it to stop. I'm guessing I have a sticking relay or something like that. Any ideas?
    Thanks

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