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Relay clicks, but wire feed motor wont operate

Hobart 175. wire quit feeding, checked wire is free. relay clicks when trigger is pressed, but roller will not turn and feed wire.

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  • rjdadio
    rjdadio May 11, 2010

    Does it have any output at the tip...voltage? at any setting?

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  • 225 Answers

Check for power to drive motor,if power is there when you pull gun trigger then motor is bad.if no power look for bad wire connections then relay.

Posted on Jul 05, 2009

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Might have a tangle on the spool, making it difficult to turn. Or there could be a relay for the motor control that isn't making contact.

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You do not indicate if the wire is already out of the nozzle. If not, commonly the wire can jab the side of the tube it runs through and cannot advance.

IF the wire is already threaded, then there MAY be a fuse to protect the motor.

The click MAY be the gas valve, or the relay driving the motor and/or the main transformer for welding current. The circuitry for these is relatively simple and a voltmeter is your friend to troubleshoot this.

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Hobart Handler 175 Wire doesn't feed when trigger operated.


First, UNPLUG the Welder! There is a small control board (2"x2") that the feed motor plugs into, it has a fuse on it. Here is what you do: Follow the circuit board trace that goes from one side of the fuse though a resistor then to the connector full of wires on the edge of the board, check that resistor for continuity it should read some value besides open. If it is open, this is your problem (as the drive motor ages it draws slightly more current than new, which should blow fuse, but instead blows the resistor). The resistor should be replaced with same resistance value, if problem persists replace again but instead of 1/4amp bump up to a 3/4amp for $1 or replace that drive motor for $150, you choose. Good Luck!

NOTE: As with any circuit board, take precautions to prevent ESD damage to board.

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A schematic would certainly help, give Hobart a call and ask for a wiring diagram. or manual. Hobart are very helpful and may even give you guidance, you may have to pay the postage, they usually fax these documents so it will not cost you anything.

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