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Dirty weld Sir, I have been tig welding for 38 years and this is the second syncrowave 250 I have had that after a few years has started doing the same thing. I took the other one to a Miller factory sales/service facility a number of times, they sent a technician to my shop to see if maybe there was something there to cause the problem but finally they gave up, they couldn't fix it. I bought another one and now have the same problem. I think it is a printed circuit problem. I have an L-Teck squarewave 250hp tig welder that I have had for 15 years and still works like new, also a Esab tig 250 and a Lincoln275 tig that work fine, so there isn" a problem with the power supply and I have changed bottles, torches, cups, tungsten and everything else to no avail. I'll be buying another welder if I can't fix this one and it won't be a Miller syncrowave 250. Thanks for your response, Marv.

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  • howardroark May 11, 2010

    Thanks, Marv. I'm sure at this point you are right!

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What kind of problems you haveing with your miller.is it the board you talking about.are the hf .droping out not comeing on .i work on millers and a lot of syncrowaves 250.if you can be a littal more specific i will try to help you scott

Posted on Sep 15, 2009

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Clean your metal with a good peace of the green scotch guard scrub pad prior to the weld.Also try turning up your gas and move a little faster when using filler wire,rember to much heat causes a darker dirter weld.hope this helps

Posted on Feb 08, 2009

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