cooling fan on high speed

July 28, 2013, 01:09:31 pm

Have a 03 allure #30842 with cooling fan on high speed. Need info on repair.

Re: cooling fan on high speed

Reply #1 – July 28, 2013, 04:23:58 pm

Check the fuse for the controller; I believe when the fuse is pulled, or blown, it will default to the high setting.

Roger Harper
2006 Intrigue
#11990

Re: cooling fan on high speed

Reply #2 – July 28, 2013, 05:54:47 pm

Yahoo Message Number: 89971

I assume that you are refering to the cooling fan that serves the radiator. If so, I can assure you that many other CC owners have experienced the same problem. I would recommend that you take the following steps to determine the problem. First I would check the fuse that serves the fan controller circuit. If yours is like mine the fuse will be located in the bay directly under the drivers seat. If that fuse is bad the radiator fan will run in the default position which is high speed. If the fuse is blown replace it and check to see if the fan returns to normal operation. If the fuse is not the problem I would start with replacing the two fan controller sensors. The sensors are located in the engine bay one is the liquid coolant sensor and the other is the air temperature sensor. These sensors are not expensive, but somewhat difficult to get from Sauer-Danfoss. After replacing the sensors I would take a trip in the coach to see that the fan controller is keeping the engine tempeature in the proper range, 190-195 degrees. If that does not solve the problem then the fan controller located on the lower rear section of the radiator housing will need to be replaced. Lead time on that part from Sauer-Danfoss is approximately eight weeks. The bad news is the cost which will set you back about $1000 plus installation which will run another $1000-1500. The sensors will run less than $100 and they can be replaced by the owner.
I have experienced two failures of the fan controller unit on my coach and been through the pain of learning on the run. If you ever experience an engine overheating issue just pull the fuse for the fan controller and the radiator fan will default to high speed operation. That will get you to the nearest service center. Another option would be to unplug the fan controller unit located on the radradiator housing. That will also put the fan in the high speed mode.
Now some bad news about Sauer-Danfoss, they are not very customer service oriented. They will not provide much information when contacted and will always refer you to their dealer network. Their dealer network provides even worse customer service.

Good Luck,

Jon Gullette

2004 Inspire #51008
Cell: 615-752-6130

Re: cooling fan on high speed

Reply #3 – July 28, 2013, 10:56:28 pm

Yahoo Message Number: 89980

Lots of information on this forum on the fan controller.
As already said, if there is no power to the fan controller it will default to high speed. Check the fuse and check to see if the fan controller plug is connected.
Also, if you run the dash air conditioning it will cause the fan to run on high speed.
There are three sensors. One for the turbo charger air temperature, one for the engine coolant temperature and the third being the switch on the dash a/c compressor.
The two temperature sensors on my system failed and the fan would only run on low speed and would in many cases, have an engine overheat condition.
You can check the resistance of the the two temperature sensors with an ohm meter. In my case, both temperature sensors tested as an open circuit.

I purchased my two sensors from Berendsen Fluid Power for $84.

pete

2000 40' Magna CAT C10, #5892

Country Coach Owners Forum Country Coach Motorcoach Forum