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Re: Fan that turns on when coolant temp gets to ho (archive)

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Posted by CFL on November 03, 2000 at 09:06:10:

In Reply to: Fan that turns on when coolant temp gets to hot? posted by Lane on November 02, 2000 at 16:47:50:


Hello Again :)

I had just recently had a whole new cooling system (thermostat, radiator, water pump, etc.) put in my M3. Now, forgive me if this is a dumb question, I really dont know much about cars mechanicaly. As I understand it the fan in front of the engine is on "low" speed when the ac is on, and should switch to "high" speed if the temp gets to hot. Well the thing is the fan is always spinning, even when the AC is off. The car could have been sitting over night, and when I wake up and start the car (AC is off) the fan starts spinning instantly. Is this normal for the fan to ALWAYS be on, or do you think my mechanic screwed something up when the coolant system was replaced?

Thanks Again!

First things first. Which fan are you referring to? The one that you can see in the engine compartment? That is not the auxiliary fan.

The auxiliary fan can only be seen if you crouch down in front of the car and look through the kidney grills. That's the low speed high speed fan. The other one is mechanical and is always on. (some of our Euro brothers w/o Air conditioning do not have this fan)



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