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F10 / F11 (2011 - Current)
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  #1  
Old 03-19-2014, 02:59 PM
shutup25 shutup25 is offline
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A/C Making Strange noises - Any Ideas? Help!

I just bought a 2014 535i xDrive. Whenever I turn on the air, I start to hear strange noises coming from what seems like behind the vents / front of the hood. Of course, the one time I brought it in to my salesman to hear it, the car stopped making the noise.

Fortunately, I was able to capture the sounds on audio a couple hours later. I've uploaded them to soundcloud here:

If you skip to the :50 mark through 1:25, it's most easily audible. You'll need to crank up the volume!
https://soundcloud.com/shutup25/weird-a-c-noises#t=0:50

Any idea what this could be? Any help or thoughts would be greatly appreciated. It's a lot easier to hear / louder through speakerphone, and I've already sent it to my salesman and am awaiting word.
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  #2  
Old 03-19-2014, 03:33 PM
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markl53 markl53 is offline
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I couldn't really hear anything other than steady background noise, even at the times in the recording you noted. Is it a slight clicking? The system is possibly making small adjustments in the vent settings, etc. Again, can't hear anything obvious, maybe it's more notceable actually being there.
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Old 03-19-2014, 03:40 PM
shutup25 shutup25 is offline
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Gotcha. Yeah you really have to crank up the volume. But if you can hear those sounds that almost sound like the audio is getting choppy, almost like a cassette player screwing up while trying to play a music tape? It's very similar to that sound.

And it's definitely much more noticeable in person than in the audio...noticeable enough that I can't ignore it and it's really bothering me. Only when the air is on, though.
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Old 03-19-2014, 03:48 PM
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markl53 markl53 is offline
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Quote:
Originally Posted by shutup25 View Post
Gotcha. Yeah you really have to crank up the volume. But if you can hear those sounds that almost sound like the audio is getting choppy, almost like a cassette player screwing up while trying to play a music tape? It's very similar to that sound.

And it's definitely much more noticeable in person than in the audio...noticeable enough that I can't ignore it and it's really bothering me. Only when the air is on, though.
You shouldn't hear those sounds -- yes, have it checked again.
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2014 535i Individual | Azurite Black/Amaro Brown Merino | Premium | Cold | PDC | Rear Camera | Anthracite Hdr
Prior: 2011 535i AT | Black Sapphire/Cinnamon | Premium | Heated Sts | Nav | Sirius | Anthracite Hdr & Trim
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  #5  
Old 03-19-2014, 09:19 PM
PhilH930 PhilH930 is offline
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I too noticed strange intermittent sounds behind the vents soon after purchasing my car. To me, it sounded like a sloshing sound (unable to match to your sound recording). There may be overlap here. Long story short, I went back to the dealer and the service foreman checked the car over (made sure drain plugs were removed and no blockage in the lines). He was unable to recreate the sound (of course!), but it did go away. Perhaps a visit to the dealer to check it out - probably something simple.

http://www.bimmerfest.com/forums/sho...518&highlight=
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Old 03-19-2014, 10:51 PM
shutup25 shutup25 is offline
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Thanks for sharing your story. I texted the salesman the audio in the hope that he recognizes the sound or otherwise suggests that the service shop take a look at it. Still awaiting a response so we'll see what happens. In the meantime, I'll try to get a better audio clip (although hopefully I'll somehow never hear it again and this thread can just die!).
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