Just another testimony: Today got caught in parade-like stop and go traffic. When I looked at my engine temp off my Powervision, it read 397 degrees and going up. I said what the heck is going on…come to find out, I had my fan turned off. So at about 400 degrees, I turned the fan on in the same stop and go traffic. My temp went down to 345….at 55+ degree decrease in a few minutes. Just awesome to have a fan. – HSCIC, HD Forum