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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > Noisy Air Conditioning (AC)
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      11-11-2015, 12:58 PM   #1
maverick83
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Noisy Air Conditioning (AC)

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So I've owned 3 F30's since 2012, and my current car - F30 320d M-Sport had numerous issues since purchase.

1) Humming noise at 80km/h - after complaining several time at the dealer, they swopped my 18"s to 19" brand new, what I wanted and solved the issue.
2) Clunking noise from right front when going over bumps - still there no-one seems to be able to help. I had this issue with my other two also, so I am assuming its a common issue.
3) Door lock rattle, resolved myself.
4) Steering rattle, resolved myself.
5) Noisy air-con - oscillating humming whirring noise that accompanies the revs.

So number 5 - is the one that is now totally driving me nuts!! My first F30 also had this issue but after its first service went away. 1 Dealership (Sandton Auto) says its leaves in the "fan" and supposedly took it out at a service but problem still there. Car then had to go in for rear break pads. Took it to Dealer 2 (Menlyn Auto), I told them its NOT leaves they need to resolve it. After collecting the car, noise was gone for about 1 month. How did they resolve it - well according to them, the A/C gas was low so they topped it up. Now - question to them was - did you find a leak? Answer: no leak. So where did the gas go??

Now - taking it back to Sandton Auto - took a technician with me after one morning of 35-degrees Celsius and louder than usual humming whirring oscillating noise and loss of power and heavier than normal fuel consumption.

Car will go there on Tuesday - and sure as hell hope they sort it out because its driving me absolutely nuts!! My opinion is that its the Aircon Compressor or bearing or something because, if you turn off the AC button the noise goes away, and all power returns to normal - switch it on and its like explained.

So - question to anyone or everyone on here - is there anyone who has had an Aircon compressor replaced or experienced similar issues with the A/C, and how did you get it resolved?

Thanks!!
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      11-17-2015, 08:49 AM   #2
maverick83
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New compressor... Parts will be ordered today and be fitted tomorrow. Hopefully they know what they are doing.
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      11-19-2015, 01:50 AM   #3
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Thought I'd continue this monologue...

Car went in this morning - words of the SA - "This will be the first aircon pump we replace on an F30"

Not very comforting words I must say...
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      11-19-2015, 12:20 PM   #4
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Quote:
Originally Posted by maverick83 View Post
New compressor... Parts will be ordered today and be fitted tomorrow. Hopefully they know what they are doing.
Sounds like the right move based on what you described. Especially worrisome is the fact that you were losing power when the AC was on.
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      11-19-2015, 01:25 PM   #5
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Quote:
Originally Posted by maverick83 View Post
Thought I'd continue this monologue...

Car went in this morning - words of the SA - "This will be the first aircon pump we replace on an F30"

Not very comforting words I must say...
Not sure why this is causing concern…I had to replace my compressor in my 1992 Miata last year and the one on the 1999 Passat is still working fine ( but the evaporator is shot).

So yours is obviously defective and it really isn't surprising that no one else's has been. AC compressor replacement is straightforward - pull the old juice out, replace the compressor, orifice tube/expansion valve, and receiver-dryer/accumulator, pull a vacuum, reload juice. Please note those other parts should be replaced when opening the system, but because your stuff is so new they may not. But they MUST pull a vacuum on the system.
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      11-19-2015, 03:28 PM   #6
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Well new compressor is in and there is NO noise and power is 100%!

Wasn't cheap - but was covered under the 2 year unlimited km warranty.

Car has 32000km
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      11-19-2015, 06:50 PM   #7
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I don't have any of these problems in my F36.
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      02-25-2016, 01:36 PM   #8
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So today the noise returned!!! Will be phoning the dealership tomorrow... Not impressed
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      03-16-2016, 03:59 AM   #9
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While diagnosing the issue at the dealership and the vehicle standing outside with the bonnet open, my eye caught some green goo on one of the aircon pipes. Technician immediately said that the aircon is leaking hence the noise.

They are ordering parts today for replacement tomorrow. Hopefully this will cure the noisy aircon once and for all.

Just in time for my 1500km road trip over easter...
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      03-16-2016, 10:49 AM   #10
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Not all parts are available... : Must be ordered from Germany - 2 week wait...
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      Yesterday, 04:23 PM   #11
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The noise which is was still not sorted out turned into this tonight.
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