Clutch Fan vs. Electric Fan
#1
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Hey guys I need some help....
I have a 2000 Durango 4.7 with the Heavy Duty Service Group and Trailer Tow Package. I have been having some cooling problems. I was wondering... should the belt driven fan be always turning? Also, I was wondering when the secondary electric fan should engage? I was driving around and it was over 90 outside and the gauge went over 210 degrees and the electric fan did not turn on? The needle goes over halfway even when sitting in traffic for a couple of minutes.
Any help would be greatly appreciated.
I have a 2000 Durango 4.7 with the Heavy Duty Service Group and Trailer Tow Package. I have been having some cooling problems. I was wondering... should the belt driven fan be always turning? Also, I was wondering when the secondary electric fan should engage? I was driving around and it was over 90 outside and the gauge went over 210 degrees and the electric fan did not turn on? The needle goes over halfway even when sitting in traffic for a couple of minutes.
Any help would be greatly appreciated.
#2
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#6
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It sounds like the fan is doing its job to me. The electric fan comes on with ac running. Try turning on the ac and see if it comes on. If it doesn't you have an issue there. I cannot remember what temp the electric fan is supposed to come on at but it is supposed to come on if your truck gets hot to supplement the mechanical fan.
Also test your radiator cap.
Also test your radiator cap.
#7
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aha. 1 step ahead of ya. I tested that today. I had max a/c on and only the big mechanical fan was engaged. so to be clear, the big mechanical fan should always be turning but the little electric fan should only come on when the air conditioning is running or if extra cooling is needed ie. towing, high load... is that correct?
Last edited by Durango1992; 08-14-2010 at 04:29 AM.
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