Quote:
Originally Posted by Jorn
Noticed that the aux fans of my 1990 300SE turn on when the engine is at normal operating temperature of 80*C with no AC. This happened in the last three days, any suggestions of what could cause this? Now that I think of it, it started doing this after I ran the AC for the first time since the summer.
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Do they come on at high fan speed or low fan speed?
if at low speed then check the switch on the a/c receiver drier (when it's closed the fans run, there are 2 sensors only one does fans)
if at high speed then check the sensor on the cylinder head