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  #1  
Old 03-31-2010, 03:33 PM
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Join Date: Mar 2010
Posts: 2
Default Grinding Sound When AC Air Conditioning is OFF

Apologies in advance if this has already been covered somewhere - I've had a good look but can't find anything that seems to cover it.

I purchased a 2006 S80 SE 2.4 D5 about a week ago and have been extremely happy with it until this morning.

There's now a loud grinding noise coming from under the bonnet whenever I turn the AC OFF. When I turn the AC on the grinding dies away after a few seconds. When I turn the AC off, the grinding sound starts and continues until I turn off the AC or the engine. The sound seems to change in pitch when I go faster.

The only thing I can recall doing differently this morning is turning the temperature onto HI and the fans on full as it was very cold. The AC was on during the journey - then when I turned the engine off (which obviously turns the AC off) the grinding noise happened for the first time for a few seconds. When I turned on the engine the grinding happened for a few seconds and died off (as the AC was turning on) - then I noticed the grinding noise stays on continously when I leave the AC off.

Does anybody know what this is? Something to do with the compressor maybe? - I've read the compressor may be £500+ to replace.

Thanks

Last edited by Thundamentalist; 03-31-2010 at 03:35 PM.
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  #2  
Old 04-03-2010, 09:44 AM
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Join Date: Dec 2009
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Not that it helps, but I just had the same issue on my car. Didn't find anything that night and took the motorcycle to work the next day. The next time I ran the car, the noise was gone. If you find out what it is, please post!
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  #3  
Old 04-04-2010, 08:49 AM
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Join Date: Mar 2010
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A family friend who's been a mechanic all his life checked it out yesterday and it's the bearings in the compressor clutch that are the problem - basically I need a new compressor which I think will cost a few hundred pounds. I've only had the car a few days though so it should be covered by the warranty as it's a mechanical fault (and it should be covered by the sales of goods act anyway - i.e. the goods should be fit for purpose) - I'm keeping my fingers crossed that the car dealership do the decent thing.
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Old 04-10-2010, 10:54 PM
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Join Date: Dec 2009
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Sounds expensive! I'm gonna try some WD-40 on the clutch mechanism before tearing it out.
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Old 04-10-2010, 10:54 PM
 
 
 
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Tags
ac, air, car, compressor, conditioner, conditioning, crunching, engine, grinding, loud, makes, noise, sound, turn, turned


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