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I don't believe your coach has a fan clutch.  It should have dual hydraulic driven fans.  The Sauer Danfoss electronic fan controller for the hydraulic fans is prone to failure.  You'll know when it's failed because the fans will roar and kick up dust. 

Repairing the electronic controller is expensive and they typically fail again.  Many of us installed a wax valve mechanical controller. 

The coaches equipped with Detroit 60 engines came from the factory with a wax valve controller.  

Lots of good reading here:  https://www.irv2.com/forums/f115/fan-stuck-wide-open-376611.html

Pictures of the electronic controller post #126:  https://www.irv2.com/forums/f115/fan-stuck-wide-open-376611-9.html

Post #140 has repair options: https://www.irv2.com/forums/f115/fan-stuck-wide-open-376611-10.html

My ISX install post #142: https://www.irv2.com/forums/f115/fan-stuck-wide-open-376611-11.html

Edited by vito.a
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I have a 2000 signature cummings m11,  I thought older ones like mine had both that wax controller was primary and electric controller was the fail safe. Thought I read that, any insight? 

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I'm not sure about the 2000 M11, but the 2000 Cummins ISC has a mechanical wax valve.  

From a post by Van Will:  My 2000 Dynasty, Oregon-built in late 1999, was originally equipped with a wax controller.  It is a small device plugged into the top rear of the radiator with two small hydraulic lines attached to it.

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I follow a lot of people's responses on here even if it has nothing to do with my year or model. Vito and dr film are some knowledgeable folks.  Thanks for taking the time in spreading your wisdom ...  Sorry for the detour  on the original post.

Edited by Romeo84
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