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  1. #1
    Join Date
    Jan 2013
    Location
    CO
    Posts
    3

    Default Contunuos gas flow when Millermatic 175 is powered on

    Hi, I've got a gas flow issue, as my wife would say. When my Millermatic 175 is powered on using the on/off switch, the shielding gas begins flowing from the gun even though I haven't pressed the trigger. I'm able to stop gas flow by switching the welder off. Everything else seems normal; wire feed, speed, voltage, bead, etc.

    Any ideas on how to fix?

  2. #2
    Join Date
    Jul 2010
    Location
    Salem, NJ
    Posts
    271

    Default

    I had the same problem with a passport. My machine was still under warranty, but they just changed out the valve and it was fine. It could be that the valve is stuck (doubt it but possible), the solenoid is getting low power, solenoid is getting no power (don't know if it is normally opened or closed), or something with the board that cruizer can help with.

  3. #3
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,670

    Default

    Going to have to tap the back relays on the board, cause one is stuck on and can't remember which one it is,

  4. #4
    Join Date
    Jan 2013
    Location
    CO
    Posts
    3

    Default

    Thanks CM and Cruzier,

    i reached out to miller tech support and it sounds like I need a new "omron g8p-1c4p-dc24 relay", which looks to be a $3 part vs $400 for a new board. Now I just need to find some tutorials on pc board soldering or find a local shop that do the delicate work for me.

  5. #5
    Join Date
    Jan 2013
    Location
    CO
    Posts
    3

    Default

    Anybody know which of the 3 relays controls the gas valve?
    Attached Images Attached Images
    Last edited by Klayton; 01-23-2013 at 11:04 AM.

  6. #6
    Join Date
    Jan 2013
    Location
    Sugar Hill Georgia
    Posts
    11

    Default

    The one that is stuck on sorry I needed to humor myself... ohm out from sol. to relay. with the board plugged in of course

  7. #7

    Lightbulb gas flow

    Quote Originally Posted by Klayton View Post
    Hi, I've got a gas flow issue, as my wife would say. When my Millermatic 175 is powered on using the on/off switch, the shielding gas begins flowing from the gun even though I haven't pressed the trigger. I'm able to stop gas flow by switching the welder off. Everything else seems normal; wire feed, speed, voltage, bead, etc.

    Any ideas on how to fix?
    sometimes it maybe a flow meter,however the tigger maybe stuck. that is normal if it's new?not to worry. your miller dealer should have a tigger.
    what happens inside the gun there are two wire connectors. sometimes they get get, lose and sticks open.it can stick open,or not work at all.
    thus gas fow,and can't shut off.
    if that is not the prolem then a valve sticking will do the same thing.such as flow meter or internal.
    this is what sometimes happens? fix this is- easy.

  8. #8
    Join Date
    Sep 2005
    Location
    Houston, TX
    Posts
    890

    Default

    Quote Originally Posted by welding insp.48 View Post
    sometimes it maybe a flow meter,however the tigger maybe stuck. that is normal if it's new?not to worry. your miller dealer should have a tigger.
    what happens inside the gun there are two wire connectors. sometimes they get get, lose and sticks open.it can stick open,or not work at all.
    thus gas fow,and can't shut off.
    if that is not the prolem then a valve sticking will do the same thing.such as flow meter or internal.
    this is what sometimes happens? fix this is- easy.
    My HH187 did the same thing after sitting unused for a few years. It was the switch, but I removed it and replaced it, and the problem went away. Miller has a manual for the M-10 Mig gun that explains how to disassemble it.

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