Engine Fan never turns off - E90Fanatics

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Old 01-20-2013, 10:26 AM   #1
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Join Date: Jan 2013
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Engine Fan never turns off


I have an e92 (320i). I have noticed that once the engine fan starts, it stays on until the car is turned off (The fan will stop after 2-3 seconds after turning off the car)

I've used the hidden menu to monitor the coolant temperature while driving.
I have noticed that the fan is starting at ~ 94-95 degree Celsius. The only way I can make the fan stop for a while when driving, is to turn on the heater. This will reduce the coolant temperature to ~ 84 degrees C.

Note that the car never overheated (i.e. I've never had the signal on the board. I've tested all the signals using the hidden menus again to make sure the overheat signal works at least). In addition, I've had the car scanned and we got nothing ...

Any ideas? What should I start checking?
Temperature sensor? thermostat? water pump?

Thanks a lot,

Last edited by gfisher82; 01-20-2013 at 01:38 PM.
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Old 06-30-2013, 07:10 PM   #2
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Engine Fan never turns off

I would check the wiring harness and sometimes the coolant temp sensor goes bad causing the fan to stay on.

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Old 07-01-2013, 11:05 AM   #3
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I'd start by checking the condition of the temp sensor.

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Old 07-02-2013, 08:05 AM   #4
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Same thing happened to me water pump forsure
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