fan not working

[coffinscreekcustoms]

It seems my fan isn't kicking on, on my millermatic 200 I'll be welding hot and it will slowly decrease to cold. Any ideas of how to check to see if my fan is still good? Thanks jake

[shovelon]

It seems my fan isn't kicking on, on my millermatic 200 I'll be welding hot and it will slowly decrease to cold. Any ideas of how to check to see if my fan is still good? Thanks jake

You have fan on demand. It is supposed to kick in when needed, then shut off when cooled.

There is a thermostat/thermocouple somewhere on the transformer (TP1). It could be failing. That would be the first thing I would check. Or jumper it and see if the fan stays on.

Great machine, worth fixing.

[big mike]

It depends on serial number if it has fan on demand