2006 BMW 325 Fan running very loud when heater is on.

Tiny
ASHALL29
  • MEMBER
  • 2006 BMW 325
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 64,000 MILES
I noticed my fan was making a loud noise when my heater is on. It gets really loud and goes up than down and up and down. Sometimes it won't go off. Sounds like an airplane running. Then today when I was driving it the hot air turned to cold and the temperature light flashed on and the car overheated. It only makes the loud noise when the heater is on. Any suggestions would be appreciated. Thanks!
Monday, March 1st, 2010 AT 7:46 PM

3 Replies

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,603 POSTS
I wish to be clear, which fan are we talking about here, the auxiliary fan or the blower fan for inside the car?
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Tuesday, March 2nd, 2010 AT 10:57 AM
Tiny
ASHALL29
  • MEMBER
  • 2 POSTS
The auxillary fan.
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Tuesday, March 2nd, 2010 AT 6:36 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,603 POSTS
I would take the over heating issue first, the aux fan might just be normal noise, I can't tell from cyberspace.
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Tuesday, March 2nd, 2010 AT 10:48 PM

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