What should I do if the machine overheats during welding?
If the unit overheats, the thermostat(s) will trip, output will stop, and the fan will run. Wait fifteen minutes to allow the unit to cool down before resuming welding. Reduce amperage or duty cycle before welding again to prevent recurrence. (Page 8)
From the official Miller Millermatic 211 Auto Set manual, page 8
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