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Lincoln weld pak 100, no heat penatration on the D setting

I used to be able to weld badass welds on any size of metal with my Lincoln weld pak 100. now its like it is stuck in the A setting when I am using it in the D setting, the wire speed is down low between 2 and 3 and nocking the trigger back. and I noticed its blowen the 20 amp breaker at the fuse box after 5 mins of welding, and the thermal switch doesn\'t seam to be working when U push it in it stays out do U think the thermal switch is the problem?

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  • mark martin
    mark martin Mar 20, 2014

    lincoln weld pak 100 is capable of welding way out of those so called pyramiters. grind out V,then heat,then mutible pass welds,its 1 bad little welder. I have gotten my moneys worth out it and then some.

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I believe your voltage control rheostat (potentiometer) must be worn out. Check your owner's manual for the part number and request it, it's not expensive and it is an easy part to replace. If you are doing that would be a good idea to do the same for your speed control rheostat.
Or clean them if you can, take off all the carbon particles that it build up with the time.

Posted on Mar 31, 2014

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SOURCE: My lincoln welder lost its heat penetration

It only produces 100amps. You can only weld thinner metal 3/16" comfortably. Any thicker will resuld in less/no penetration.

Posted on Sep 22, 2009

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1 Answer

My lincoln welder lost its heat penetration


It only produces 100amps. You can only weld thinner metal 3/16" comfortably. Any thicker will resuld in less/no penetration.

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