Welder thermal fault or overheating light

The thermal light comes on and the machine stops welding. That is the machine protecting itself. The question is why it got hot.

What to check first

1. Leave the machine on with the fan running for about 15 minutes. Do not turn it off while it is hot.
2. Check that the fan spins. If it does not, stop and call us.
3. Make sure the vents are not blocked and the machine has room around it.
4. Look at your duty cycle. Welding for longer than the machine is rated for will trip it.
5. Skip long or thin extension cords. Low voltage makes the machine work harder.
6. In a hot or dusty shop, move the machine to cleaner, cooler air.

Safety: Do not open the case. Welders hold a dangerous charge inside even when they are unplugged.

What it usually is

• Dust and metal debris packed inside the machine
• A failed fan
• A failed temperature sensor
• A part that is wearing out and running hot

When to call us

It overheats fast, overheats again and again, or the fan is not working. Regular service and cleaning helps prevent this.

Call and tell us the brand and what it does. In 2 days we'll tell you what's wrong, and we'll fix it. We come to you within 100 miles of Charlotte. Finding out what's wrong costs $250, and it goes toward your repair. See pricing and warranty.