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Jeffrey WashingtonAug 21, 2025
What to do if my Lincoln Electric Welding System trips off immediately when the wire feed unit start button is pressed?
- MMartin JordanAug 22, 2025
If your Lincoln Electric Welding System trips off immediately when you press the wire feed unit start button, consider these possibilities: * A blown input fuse: Check for a blown fuse and replace it after identifying the cause. * An open phase in the main transformer: Inspect the main transformer for an open phase and repair it. * Faulty control or firing circuit P.C. boards: Ensure all light emitting diodes are lit on both P.C. boards, except LED4 on the control/fault board. * A defective output control potentiometer: Check the potentiometer and replace it if faulty. * Open output control potentiometer leads: Repair leads 76, 77, 226, 236, 237, 238.