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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 06-08-2010, 08:36 AM
kingfish kingfish is offline
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Location: Florida
 
Join Date: Oct 2008
Posts: 13
Mein Auto: 525i
2001 525i AC Pusher Fan doesn't work

My AC in the car gets that musty smell and stops cooling until I start driving the car. But when ever I come to a stop light the smell comes back and the humidity rises. I noticed that when the car is sitting idle that the Pusher fan in front of the radiator doesnt turn. i poked the fan motor to see if it was frozen but it turns freely so I'm suspecting the motor is fine and the control unit that engages the fan is not working. Any suggestions?????
Kingfish
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  #2  
Old 06-08-2010, 08:49 AM
edjack edjack is offline
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Mein Auto: '97 540i 6 speed
Search this site for troubleshooting instructions. Your fan has an integral controller that gets a signal from the engine computer. Sometimes the controller goes bad.
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  #3  
Old 06-08-2010, 08:51 AM
cn90 cn90 is offline
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Mein Auto: 1998 528i 5-sp 140K+
Check Fuse 75 (30A). Also check the temp sensor (lower radiator hose, "Coolant Outlet Temp Sensor" in the pic below):

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  #4  
Old 06-08-2010, 09:05 AM
Jim Rolando Jim Rolando is offline
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Mein Auto: 1999 528i
You're in good company. Several of us have suffered at the hands of this little bit of German egineering. Start with the two suggestions above. Good luck.
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  #5  
Old 06-08-2010, 09:05 AM
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Josh P. Josh P. is offline
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Mein Auto: 2001 530 SP/PP/CWP/Slush
My coolant outlet temp sensor had some corrosion that was affecting the main fan speed due to inaccurate temperature reporting. Easy and cheap fix. Just pull the sensor out and check the connections. One possible solution.
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  #6  
Old 06-08-2010, 09:06 AM
cn90 cn90 is offline
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Also, if you pull the coolant temp sensor out, replace the O-ring, search the forum for the O-ring size.
BMW only sells the whole temp sensor, the O-ring is not sold separately.
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  #7  
Old 06-08-2010, 12:24 PM
Mr Majestik! Mr Majestik! is offline
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Mein Auto: 2002 525i
Question Where is fuse 75 located?

Quote:
Originally Posted by cn90 View Post
Check Fuse 75 (30A). Also check the temp sensor (lower radiator hose, "Coolant Outlet Temp Sensor" in the pic below):

I can't find it???
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  #8  
Old 06-08-2010, 12:33 PM
cn90 cn90 is offline
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Quote:
Originally Posted by Mr Majestik! View Post
I can't find it???
Here you go:
http://www.bimmerfest.com/forums/sho...d.php?t=205728
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  #9  
Old 06-08-2010, 02:20 PM
Mr Majestik! Mr Majestik! is offline
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Thanks!
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