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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > Buzzing noise coming from possibly HVAC system?
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      04-16-2019, 10:42 AM   #1
blakeelkin
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Buzzing noise coming from possibly HVAC system?

Hey everyone! My car has been making a strange buzzing noise when I get in the car or sometimes when I'm driving. It's done it since I got it but now that the warranty is about to run out I figured it's time I get it fixed. Anyone know what it could be?? Here's a video.

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      04-18-2019, 06:48 AM   #2
D1gg3r
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Sounds like it's one of the HVAC flaps that's stuck.
I believe when the car is locked all flaps are in closed position, once you get into the car they are set to open - that's why you can hear this when you get into the car. If you'll play with HVAC blower position settings you may be able to reproduce the sound as well. Should be fixed under warranty.
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      04-18-2019, 08:27 PM   #3
blakeelkin
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Quote:
Originally Posted by D1gg3r View Post
Sounds like it's one of the HVAC flaps that's stuck.
I believe when the car is locked all flaps are in closed position, once you get into the car they are set to open - that's why you can hear this when you get into the car. If you'll play with HVAC blower position settings you may be able to reproduce the sound as well. Should be fixed under warranty.
Quote:
Originally Posted by D1gg3r View Post
Sounds like it's one of the HVAC flaps that's stuck.
I believe when the car is locked all flaps are in closed position, once you get into the car they are set to open - that's why you can hear this when you get into the car. If you'll play with HVAC blower position settings you may be able to reproduce the sound as well. Should be fixed under warranty.
Thanks, I'll try this out and then take it to my SA if I can recreate it!
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      05-05-2019, 01:29 AM   #4
Blemus2061
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You most likely have something stuck in the blower, leafs or paper that got through the screen when you had it in fresh air mode. Dealer most likely will tell you not warranty since it's not their fault that trash got in your blower. It's easy you just need a 10mm socket and a T20 torx to drop the blower. Remove the lower panel under the glove both two nuts and help on by clips then you can see the lower only a couple torx screws drop the motor and clean the debris out.
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