Hey y'all, Been having problems with my Hobart Handler 175 It started with the wire not feeding after pressing the trigger, I could hear the relay clicking but wire did not come out, started troubleshooting at the HOBART site found out it was the 'PTC1' capacitor, small round yellow ceramic thingamajig that shuts off the gun when overloaded, I replaced that. It was working fine for about 2 weeks, then it started again, this time the relays don't even click. So you wait a few minutes press the trigger, after about 2 seconds the wire starts to come out. Sometimes it does not. When it does not, if I arc it, then it starts to weld fine. Personally I don't want to start learning about welder PC boards or electronics, there is alot of tech help at the HOBART site but they start going into OHM readings, capacitor voltages, etc.it hurts my brain. I am sure someone has had problems with this before? Download free software for pc. Any shops or HAMBers work on these things/boards? Its almost to the point where buying a new welder is in store, I know the HH 175 is an old model, as you all know sometimes chasing ghosts will end up costing more time and aggravation that its worth. 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. Safety Quick-Guide. For arc welding and cutting the safe way! We strongly recommend that you download this clear, simple guide and keep it near your welder. NOTE: As with any circuit board, take precautions to prevent ESD damage to board. Posted on Apr 22, 2009.
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