Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › A/C (cooling fan) problem › A/C (cooling fan) problem May 31, 2012 at 11:00 am #442747 rice400Participant Run the engine to about 2000 rpm and hold it till it gets to operating temp and see if the fan comes on. If it doesnt come on and its at operating temp take a voltmeter or a testlight and check to see if you’re getting voltage at the fan