c32 cooling fan stays on high with key on?
12-03-2010, 07:43 PM
#1
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02 c32 and 94 Bmw 325i
c32 cooling fan stays on high with key on?
just wondering if any one has experience this, my cooling fan stays on high speed when the car is on and doesnt shut off until i turn off the car, and the coolant messange is on on the gauge cluster. i have an idea of what it could be but just seeing if anyone experienced this before
12-03-2010, 07:56 PM
#2
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Is the heater or AC on at all? Coolant message is either low fluid in engine coolant reservoir or low windshield washer fluid. Both tied into the same screen message.
12-04-2010, 03:15 PM
#3
just wondering if any one has experience this, my cooling fan stays on high speed when the car is on and doesnt shut off until i turn off the car, and the coolant messange is on on the gauge cluster. i have an idea of what it could be but just seeing if anyone experienced this before
09-23-2012, 08:26 AM
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A bad ecm can cause the fan to stay on
I service Bosch control units for a living so I am aware of the fan problem. This is really common for 2002 to 2004 c240 and c320. Other models may have the same issue. The ecm controls the fan so when the ecm fails then the fan stays on and runs constant. I recommend going to a Mercedes dealer to make sure you get a proper diagnosis. If the ecm is the issue then this site is much cheaper compared to the dealer http://www.mercedesecm.com Again, go to the dealer first to make sure the ecu is in fact defective.
