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Old 4th July 2018, 07:42 PM
peiiider peiiider is offline
Join Date: Aug 2015
Location: Norway
Posts: 43
Default Whining noise in the cabin

So.. I have this kind of whining noise in the car.

It varies in frequency with the engine rpm and also seems to get less audible the more I push the throttle at a constant rpm.

Its not LOUD, so if I listen to the radio I cant hear it, but its still annoying..

If I turn AC off (push econ button) the noise disappears, so..

More likely to be the AC compressor itself or a pulley somewhere ?

Car in signature, 06 3,0tdi.
06 A8 3,0TDIq My daily driver and project...
97 A4 1,8Tq. Powered by a 4,2 from the '01 S6, full rollcage, FIA seats and 6-point harnesses, B5 RS4 KW Competition race suspension, B6 S4 brakes, 18" Toyo RS1 slicks, carbon fiber roof. V8 trackday racer
14 VW Caddy 1,6TDI from my employer..
(X)00 A8 2,8q, (X)97 A4 1,8Tq, (X)92 S4 2,2Tq, (X)92 80 2,3E
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Old 4th July 2018, 09:35 PM
J i m s t e r J i m s t e r is offline
Join Date: Apr 2018
Posts: 54

It's not the Mrs, is it?

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Old 5th July 2018, 08:16 AM
mannyo mannyo is offline
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Join Date: Jan 2012
Location: Blandford, Dorset
Posts: 1,899

in warm weather I've found the radiator fan runs at quiet high RPM with the AC on that can cause more noise in the cabin, but that is a constant sound that does not vary.

2004 D3 A8 3.7 Quattro, Xenon, Bose, Blinds, Solar Sunroof, TV, ACC, phone and almost every option. 164K miles rising slowly
with retrofit AMI and DVB-T in place of Analogue
2003 Volvo S60 D5 SE Manual, 185K miles.
Past 2001 D2 A8 3.7 QS, Bi-Xenon, Bose, Blinds, Electric Everything, retrofitted RNS-D, 191K Miles
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Old 5th July 2018, 02:58 PM
David's8's Avatar
David's8 David's8 is offline
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Join Date: Jan 2012
Location: Helensburgh, Scotland
Posts: 3,052

Its a common problem - mine had had it since I bought it and is to do with HVAC fans/flaps which, apparently, requires a fair amount of work to replace. There is a thread which I contibuted to so ill see if I can find it.
Edit: This thread touches on it but it does refer to earlier posts on the subject.

2002 D2 S8 Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18 Avus, ski hatch, Bose, auto dim rear view mirror, rear blind.

Last edited by David's8; 5th July 2018 at 03:01 PM.
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Old 4th October 2018, 06:26 PM
Johnmed Johnmed is offline
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Join Date: Dec 2014
Location: Cheshire
Posts: 1,449

Mine does this. Does my nut in. Was the last thing I thought of. Id messed with everything before I switched the HVAC off and boom. Silence.

CURRENT CAR: Quartz gray 2008 A8 3.0 TDi. My installs: (2009) AMI and ViseeO Tune2Air WMA3000A, generic RVC, Westfalia OEM towbar, D4 19s and S8 MFSW with paddles.

LAST CAR: Black 2001 A2 1.4 TDi, winter pack, leather/alcantara sports seats, DIS and BrokenSky
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Old 4th October 2018, 06:47 PM
HPsauce HPsauce is offline
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Join Date: Sep 2011
Location: About 250m from HS2!
Posts: 6,687

The commonest whining noise is the auxiliary coolant pump, but that stays on even if the HVAC is off so it's not that (for a change!).
2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation".
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/Platinum. Every option (I think) except electric rear seats, tiptronic steering wheel, ski hatch, towbar & dimming door mirrors.
e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
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