Need Fan Controller Info

[ronandsue74]

I need information regarding the fan controller on a
2008 CC Allure with ISM500 Cummins.
Does it have the Sauer Danfoss controller?
If so, where is it located.
Thank you,
CCRider

[CountryFit]

TTD asked the same question here
https://www.irv2.com/forums/f112/sau...-501809-6.html

Don't have that coach so couldn't provide the info from me.

[vito.a]

Look for wires and small hydraulic hoses leading to a small assembly. It should be towards the drivers side of the coach. This is a picture on our Monaco.

[BonS]

My '09 ISM 500 has an Eaton/Vickers fan speed controller.

[TTD]

yep... I just located mine and it's definitely the Eaton Vickers

Ordering a replacement today... hoping it's an easy swap out

[Fredward]

Hold on here guys. There are two primary components to these systems. One is the electronic controller that takes input from sensors and sends impulses to the electric/hydraulic valve. The other is the electric/hydraulic valve which does what the controller tells it to.

You should troubleshoot the system to determine if its the controller or the valve or a sensor! There are detailed steps to follow. The problem might just be a sensor so replacing either or both components will not solve the problem.

I think I got that troubleshooting information from Source Engineering. And it was specific to Sauer Danfoss controllers.

Just sayin' been there done that. We ended up putting in a wax valve.
Fred

[BonS]

Originally Posted by TTD

yep... I just located mine and it's definitely the Eaton Vickers

Ordering a replacement today... hoping it's an easy swap out

An easy fan controller check is to first listen to the fan noise with a cold engine. Then unplug the Eaton Vickers connector and listen for a fan speed change. You'll have no trouble hearing the difference if it's working. When unplugged the fan goes to high speed - a very distinctly loud high speed. If this is the outcome then your fan speed controller is working. If not, then fredward is spot on with his advice.

[jl.kauai]

I had a previous Class A problem with controller that was causing the check engine light to go on. Albquerque Cummins diagnosed and ordered Danfoss for me which I later had MOT install. It was around 240.00 for a rebuilt part. Worked fine and solved the problem. Travato John

[TTD]

Here is a link to the unit that I have in the coach (and just ordered).

http://www.nwrvsupply.com/product/MCD9105.html

It appears it might have both hydraulic and electric components to it, but not sure how to separate them out. The entire unit was $250 delivered, so I figured I would get that in my hands first and then proceed.

Right now, my fan is constantly on HIGH. Great for temps in hot weather, but in regular temps I think the coach runs colder than it should in the first hour or so. Not to mention gas mileage is probably down 1mpg and it's just kind of irritating when going over dusty campground roads.