Dodge Cummins Diesel Forum - View Single Post - Fan Clutch Not Working?
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post #25 of (permalink) Old 07-30-2019, 12:37 PM
thevol
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I replaced my fan clutch with a Hayden electro mechanical unit (OEM style). I had a hunch it wasnt working right as the fan never seemed to blow hard no matter what, but it had always done this as I bought the truck with 140k on it, but never had any codes. After installing it I noticed a huge difference in fan noise so I knew something was different. Basically when you first take off after cold start the fan will be pulling hard for a little while, maybe 30sec to 1 min then calm down so if its not doing that something is likely wrong. Also climbing hills or slow moving and towing with AC on it will kick in pretty hard. Normal operation it doesnt really do that much, idling or otherwise. When it does kick in you will know it, if you are not sure if its working right it probably isnt...

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