Just a little FYI. This is from lincolns 225/125 manual.
AC/DC models above Code 8800 have an internal circuit breaker
to prevent overheating when welding on DC. The breaker will trip
and shut off the DC welding output if the duty cycle is exceeded or
if the cooling air flow is blocked."
Not that this would be an issue where the welder goes bye bye and won't restore, but it looks as tho they have incorperated one in there for later models. I s'pose one could be faulty.
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