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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 06-20-2010, 10:53 AM
strungout88 strungout88 is offline
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Location: Sarasota, Fl
 
Join Date: Jul 2009
Posts: 4
Mein Auto: 2002 540i Sport
AC won't blow any air

I have a 2002 540i. The air conditioning has worked fine since I have bought the car, never had any kind of problems. I took a quick trip to subway the other day and rode in a nice air conditioned car, when I got back in to head home the fan would not blow any air out of the vents. So again, there is no air whatsoever coming out when I turn it on at any blower speed.

I have checked and replaced the 40a blower fuse in the little bastard of a fusebox located behind the glove box. Seriously, those genius engineers really thought that little chestnut through. Anyway, it is not the fuse. Any ideas of why it would have just stopped working like someone flicked a switch off? I welcome any ideas or help anyone can give me, and thanks in advance.
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  #2  
Old 06-20-2010, 01:32 PM
edjack edjack is offline
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Location: San Jose, CA
 
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Posts: 9,238
Mein Auto: '97 540i 6 speed
Sounds like a bad Final Stage Resistor/Unit. A common failure, and it can die suddenly. Search this site.
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  #3  
Old 06-20-2010, 01:54 PM
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Fudman Fudman is offline
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Location: Sudbury, MA
 
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Posts: 6,225
Mein Auto: '02 530i Sport auto
Here are the FSU DIYs:

http://www.bimmerfest.com/forums/sho...d.php?t=143393
http://www.540i6.com/finalstagereplacement.html
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  #4  
Old 03-12-2011, 09:26 AM
ebj2788 ebj2788 is offline
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Location: Upland, CA
 
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Mein Auto: 1989 525i
Nice wheels!!
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  #5  
Old 03-12-2011, 09:27 AM
ebj2788 ebj2788 is offline
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Location: Upland, CA
 
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Posts: 3
Mein Auto: 1989 525i
How did you make out? I have a problem with my '89...and you're right life is too short NOT to drive a BMW...:-)
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  #6  
Old 08-22-2014, 07:41 AM
punash007 punash007 is offline
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Location: Atlanta
 
Join Date: Feb 2012
Posts: 9
Mein Auto: 525I
Hi, I have the same problem with my A/C. Did changing the FSU fixed your issue?
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  #7  
Old 08-22-2014, 02:04 PM
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AutohausAZ-Mike AutohausAZ-Mike is offline
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Mein Auto:
Hi Punash,

The blower motor resistor is one of the most common parts to fail in the A/C system. One of the common symptom of a failing final stage unit is the blower motor not operating in accordance to how the controls are set, almost like it has a mind of its own.

If you are still in need of the blower motor resistor/regulator, we have the OEM Behr for $48.36.

Here is a link to our site for the part:
AutohausAZ - Blower motor resistor/regulator


Disclaimer: Make sure to check the year and model of the vehicle before placing the order.
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  #8  
Old 08-22-2014, 07:37 PM
punash007 punash007 is offline
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Location: Atlanta
 
Join Date: Feb 2012
Posts: 9
Mein Auto: 525I
AC not blowing any air

Thanks for your respond. Prior to the AC not blowing any air, it was giving me a squeeling noise when start up then it would go away. With this information provided; do you thing the problem still stands as a faulty FSU? Thanks in advance for your response.
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  #9  
Old 08-22-2014, 08:12 PM
1hander 1hander is offline
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Mein Auto: 00 540i M-06 X5 4.4
that sounds like the blower motor bushings or bearings have seized
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Old 08-24-2014, 04:30 PM
punash007 punash007 is offline
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Location: Atlanta
 
Join Date: Feb 2012
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Mein Auto: 525I
Thanks. I replaced FSU and fuse 75 & 76 and still no blowing. I believe new motor is in my future.
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  #11  
Old 08-24-2014, 04:51 PM
1hander 1hander is offline
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Mein Auto: 00 540i M-06 X5 4.4
dont try to turn on the fan until you check it, youll blow fuses and probly the fsu again...
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