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Millermatic 175 no arc. No wire feed. Relay is switching

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  • Millermatic 175 no arc. No wire feed. Relay is switching

    I have a Millermatic 175.
    Went to use it today and my welder would not turn the motor to feed the wire. It will not arc when the trigger is pulled. I dont hear any gas.
    I do however see a red light below the relay on my circuit board and i hear that relay switching.

    Circuit board- LD-38. 207466

    Any ideas on this issue?

    Millermatic 175
    Sn: LC606964
    Stock no. 907049
    230v
    Last edited by Hgoody77; 07-20-2016, 07:02 AM.

  • #2
    With power switch on the fan is running. Just more info.

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    • #3
      Please post the serial number of the machine.

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      • #4
        Millermatic 175
        Sn: LC606964
        Stock no. 907049
        230v

        Comment


        • #5
          So when you push the trigger you hear clicking?...Bob
          Bob Wright

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          • #6
            Thanks for the reply Bob,
            Yes without a dout i hear tthe/a relay clicking.
            Below the relay that is clicking with the trigger action is a small red Light.

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            • #7
              I guess when i get home i will check the TP1 thermostat on pins RC2-3 and RC2-9. Although I dont have a over temp light on.
              24vac

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              • #8
                No luck after jumping out the TP1.

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                • #9
                  No luck after jumping out the TP1.

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                  • #10
                    I pulled the board out. I can't see anything wrong visually. No burnt traces. This welder has had very little use. Never over heated. Just at home hobby welding here and there.

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                    • #11
                      Looked at the wiring diagram-looks like without a schematic for the board it's really tough. After checking TP1 it doesn't seem like there much to do except go into the board. In my mind, unless you're a pro circuit board fixer or designer with the right eqpt looks like you need a new board or board repair. That part number gets no hits at Miller4less but there is a hit at BRWelding for $219, with part number crossed to 226321. I would give Miller a call and check the part number. Miller4less has the second part number for $180.
                      Last edited by Aeronca41; 07-21-2016, 06:57 PM.

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                      • #12
                        Thanks. I will contact them and see what i can get.
                        Yeah to me i wish i knew the pinout on the relay CR1 and a circuit board schematic.
                        Is there a schematic available for the circuit board.

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                        • #13
                          I received a response from Miller.
                          They don't repair the circuit boards. But they told me a place that would. And they also said that they think from my description they recommend just replacing all three relays, CR1 CR2 CR3. They included a place to buy the relays. They are 5$ each. I asked for a circuit board schematic and i will probably go ahead and order the three relays and replace them.
                          I really hope this will fix the issue.
                          I have been very easy on this welder, it's had a easy life and for it to fail like this is crazy.

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                          • #14
                            A lot of times, sitting up is far worse than running them hard.

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                            • #15
                              Originally posted by ryanjones2150 View Post
                              A lot of times, sitting up is far worse than running them hard.
                              Just like a new car or truck...Bob
                              Bob Wright

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