I have a Harbor Freight unit (probably all work the same) and it did the same thing. Owner's manual said if that happens, it was the contacter switch had failed. I ordered a replacement and sure enough it was the problem. Contact the manufacturer to see if they agree.
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Don't recall the model number but it has two heat settings. The contactor failed in the first couple minutes I was playing with the cutter. Infant mortality common to electronic stuff. They sent a new one out free of charge and I have put probably 20 hrs of really hard service on it and it is still going great. I cut the innards out of a Ford 390 FE block for one of my Mysterion engines (will hide alternator and AC compressor inside that empty block)with it and it never whimpered.
No still haven't fired up the TIG. We moved into a new home last year and I have been putting in back yard, building a 2-story castle playhouse for the the grand kids, drywalling and installing cabinets in my 1700 sqft shop, etc. Should be getting back to the fun stuff this summer.
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No still haven't fired up the TIG. We moved into a new home last year and I have been putting in back yard, building a 2-story castle playhouse for the the grand kids, drywalling and installing cabinets in my 1700 sqft shop, etc. Should be getting back to the fun stuff this summer.
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