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Old 07-29-2023, 05:08 PM
Join Date: Jul 2023
Location: Netherlands
Posts: 43
Daytonawim is on a distinguished road
Air Noise from heater fan.

I am a bit of an

When I put the fan on 3 stripes, I hear the noise from the air coming out of the center outlets. Thats bugging me a bit.
I have had quite a bit BMWs (old and newer models) but never heard it, on low fan speeds.

Who had an idee what I can do about it?, other than not using the outlet.

Its not noise from a bad blower, I know how that sounds like.
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Old 07-30-2023, 04:38 AM
andrewwynn's Avatar
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,536
andrewwynn will become famous soon enough
Record the sound. I have had chirping at certain fan speed and since I run on auto it decides the fan speed (but wish displays it).

I'll just change the tempo up or down to get a speed without the chip.

It's definitely from the motor in my case maybe enough dirt on the squirrel cage to upset balance only a problem when it finds a harmonic.
2011 E70 N55 (me)
2012 E70 N63 (wife)
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