Cooling fan problems

[jungledave]

My cooling fan will come sometimes when I start the truck for no reason. I am also having trouble with it running all the time. My engine never gets much over 200 and the fan never cycles like a normal truck would.

 

[B.G. Smith]

The fan wil run all the time but will "kick in" at a predetermined coolant temperature and also may depend on if the AC is on or off. Mine seems to be just above 200 deg. At highway speed I can really hear mine when it kicks in and I'm about deaf. If it is not working properly it should be covered under the Cummins 100,000 mile warranty. bg

 

[jungledave]

Yea the problem is it just kicks in whenever it wants reguardless of temp. I think on hot days at highway speeds it shouldn't run at all or just cycle like normal.