Miller included a feature on many of their machines which they call "fan on demand" which runs the cooling fan only as required to maintain the temperature of the machine. If I operate my Diversion 165 at an amperage corresponding to its 30% duty cycle rating for 3 minutes I am, in theory, supposed to wait 7 minutes for it to cool. However, the "fan on demand" will shut off the fan after perhaps 3 - 4 minutes.
So my question, (any Miller reps on the forum?) is...
Is it safe to consider that the necessary cool down period has elapsed when the "fan on demand" shuts off the cooling fan - thus allowing me to start welding again?