I recently acquired an Econotig 60hz 150amp, and I am having some issues with the TIG function. The Stick function throws a great arc, and I can burn through pretty thick metal on high. Not that I would want to... But when using the same connection in TIG mode, I am only getting enough heat in the arc to melt filler metal. A puddle won't form on 20 gauge Aluminum or Steel. The pedal control I am using is older and it seems loose, but when looking inside of it I don't see anything that appears bad. The inside of the welder doesn't appear to have any problems I can spot visually either. Could this be a pedal control issue, bad pedal or rheostat, or does it sound like something that warrants a repair shop like the control board? Any suggestions or experiences with this problem would be much appreciated.