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Bad capacitor?

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  • Bad capacitor?

    My Millermatic 130xp has developed a problem- If the welder has been sitting unused for a while, it will produce a couple of good welds & then quickly diminishes to a weak spark. If I leave the welder overnight- I'll get a stronger spark, & if I leave it for a couple of weeks- It will again make a weld.
    My limited electrical experience & gut are telling me the capacitor is junk. I really don't have the money to throw unnecessary parts at anything right now & I'm hoping someone here with more understanding & experience can confirm or correct my suspicion.
    Thanks!

  • #2
    Open it up and take a look.

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    • #3
      I"'ve seen the connections to the cap loosen and arc out causing a very weak weld. I'd make sure all your connections are tight and not arcing. Seldom does the cap work sometimes. When it goes you'll know it.

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