I have an older (1997) model Lincoln weld pack 100 mig welder that I bought new back in 97 . This has been a great little welder for all the small stuff I've needed to do . I've ran at least 15 10 pound spools of lincoln .035 innersheild wire through it . Well a while back it stopped working while I was welding with it and it tripped the fuse box . I took the cover off and there was alot of metal dust around the fan and on the inside of the welder . I took the air hoes to it and cleaned it out and it works now but it has no balls . I can turn the heat setting to D and the speed to 2 and I can weld thin sheet metal with fluxcore wire . I should be able to blow through sheet metal on setting B and speed on 2 . Anyone else had this problem with their lincoln welder ? I suppose I could take it to the shop but if I have to pay alot of money to fix it , I should just get another little welder . They look pretty simple inside . I have a big welder ( lincoln 175 ) but I like having a little 110 to take out side to weld stuff . Thank's for any input .