Blower Fan Stays On - BMW M5 Forum and M6 Forums
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post #1 of 6 Old 2nd September 2007, 01:05 AM Thread Starter
jemmie
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Blower Fan Stays On

I have a 2000 M5 with about 33K miles and recently the blower fan (or one of them, if there's more than one) stays on sometimes after I shut the engine off. From what I can tell it can stay on for a while as the battery was drained once.

Inside the vehicle, air comes out from the feet level but not at face level. Outside I can hear the blower.

Any ideas are appreciated. Thanks.
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post #2 of 6 Old 2nd September 2007, 01:41 AM Thread Starter
jemmie
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Other Symptoms

Here are some other symptoms:

1) Sometimes fan at face level does not blow at all.
2) Sometimes fans do not blow above a certain level.

I searched board and it looks like some people fixed similar issues by changing out final stage unit. However, I don't see replacing FSU fixing the fan staying on after engine shutting off problem.

Thanks.
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post #3 of 6 Old 2nd September 2007, 06:29 AM
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Replacing the final stage unit solved the blower problems on my 2000 M5 a couple months ago. I had both of the problems you listed below except for the blower staying on after the ignition was shut down. However, I have read here on M5board as well on other BMW forums that it is not uncommon for the FSU to fail in such a way and many people have complained about it draining there battery because it left the blower running after the car was shut down.

Anyhow, it's a cheap part - about $70 from any of the online discount oem BMW parts websites and takes less than five minutes to install. Might as well replace it and see if it resolves your issues. I'm betting that it will.

Good luck.

Mike
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post #4 of 6 Old 11th September 2007, 04:14 AM Thread Starter
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Problem Fixed

I replaced the FSU and the problem appears to have been fixed. Thanks all.
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post #5 of 6 Old 22nd February 2009, 10:42 PM
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post #6 of 6 Old 23rd February 2009, 02:00 AM
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Quote:
Originally Posted by Finesta101 View Post
Where is the FSU located?
IIRC in the cabin somewhere up/behind/to the left of glovebox. If you read older FSU threads it shows where it is/how to change.

DIY - Oil Pan Thread Repair
http://www.m5board.com/vbulletin/e39...rain-plug.html
DIY - O2 sensor change
http://www.m5board.com/vbulletin/e39...or-change.html
DIY - Replace worn and 'creaking' door seals
http://www.m5board.com/vbulletin/e39...ml#post2163106
DIY - Replace OEM battery with Bosch 49-850B
http://www.m5board.com/vbulletin/e39...h-49-850b.html
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