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Common VFD, drive, UPS, and cabinet overheating failure point.
Lincoln Electric E13 Error Code — What It Means
The E13 fault on Lincoln Electric welders (Power MIG and Power Wave series) indicates an output contactor fault — the contactor that connects the welding output to the torch/electrode circuit either failed to close on an arc-start command or opened unexpectedly during a weld. This contactor is what physically enables welding output; if it won’t close, no arc can be struck regardless of other settings.
Common Causes
- Worn or pitted output contactor contacts — The output contactor switches on every arc start. High-frequency operation causes contact wear and eventually a contact that won’t close or closes intermittently.
- Failed contactor coil — The electromagnetic coil that pulls the contacts closed can fail open, leaving the contactor permanently open.
- Control board not triggering the contactor — If the board’s output contactor drive circuit has failed, the coil never receives the energize signal on arc start.
- Wiring fault at the contactor — A broken lead or loose terminal at the contactor coil input interrupts the drive signal.
Step-by-Step Fix
- Lock out and open the machine — Disconnect input power and verify with a multimeter before opening the case. The output contactor is on the secondary (low-voltage output) side but input is still dangerous.
- Locate the output contactor — It’s a relay-style component on the output side, between the transformer/inverter and the welding terminals. Usually visible once the side panel is removed.
- Test the contactor coil — Measure resistance across the coil terminals. Open circuit = failed coil. Typical coil resistance is 50–200Ω depending on model.
- Inspect the contacts — Check contactor contacts for heavy pitting, burning, or welding together. Contacts in poor condition need replacement even if the coil tests good.
- Check the control drive signal — With a multimeter on the coil input terminals, verify the board sends the energize voltage when an arc-start is triggered. No signal = board fault.
Parts Often Needed
| Part | Notes |
|---|---|
| Output contactor | Match to Lincoln part number — coil voltage and contact current rating vary by model |
| Control board | If no drive signal reaches the contactor coil |
| Contactor wiring harness | If leads are damaged or terminals are corroded |
Need Replacement Parts?
Before ordering, match the replacement part to the model number, electrical rating, and failure symptom. Check current prices on Amazon - prices and availability change frequently.
When to Call a Pro
Output contactor replacement is straightforward for an experienced technician, but the work involves high-current connections. Lincoln Electric authorized service centers can diagnose whether the contactor or the board is the root cause before ordering parts.