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

[Hgoody77]

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

[Hgoody77]

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

[Aeronca41]

Please post the serial number of the machine.

[Hgoody77]

Millermatic 175
Sn: LC606964
Stock no. 907049
230v

[aametalmaster]

So when you push the trigger you hear clicking?...Bob

[Hgoody77]

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.

[Hgoody77]

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

[Hgoody77]

No luck after jumping out the TP1.

[Hgoody77]

No luck after jumping out the TP1.

[Hgoody77]

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.

[Aeronca41]

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.

[Hgoody77]

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.

[Hgoody77]

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.

[ryanjones2150]

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

[aametalmaster]

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

Just like a new car or truck...Bob