Thread: 93 400E Aux fan
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Old 06-05-2001, 12:22 AM
PBL PBL is offline
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Join Date: Mar 2001
Location: Colorado
Posts: 29
My 93 300E is having the same problem.

I dont think its the engine size...

My uncle also has a 90 300E. His is running hot also during the summer with the AC running.

I took it to the dealer and they said that the fan should turn on at 115. The dealer said it was some sort of sensor problem. I wanted a second opinion. Therefore, I took it to another repair facility. They said it was the Aux fan malfuction. They confirmed it by allowing the car to idle with ac on for a prolong period to raise the temp. They then measured the voltage to the fan. And sure enough, there was power but the fan did not turn. Go figure!
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