Re: ACC Noise - Saab 9-5 Bulletin Board - Saabnet.com
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Re: ACC Noise
Posted by 2000AERO [Email] (more from 2000AERO) on Tue, 6 Jun 2006 21:25:23
In Reply to: Re: ACC Noise, 8AA2YM, Tue, 6 Jun 2006 19:14:19
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I'm not exactly sure what part is making the nose, but my 2000 AERO does it as well. It's either the expansion valve, or the compressor itself. (my guess is the expansion valve)
The A/C system on the 9-5 is a variable capacity system. Whereas on the 9000, the compressor cycled on and off during low load times to prevent freezing, the 9-5's compressor can vary the amount of refrigerant it's pumping. The noise is made during low load (fan speed of 2 bars) and while at about 1500 rpm - so it has something to do with when the compressor is not fully pumping.
This is now the start of the 3rd summer I've had my car, and so far, everything is still working properly - it's just annoying.
Michael
2000 9-5 AERO
1996 9000 CSE
posted by 65.31.126...
Posts in this Thread:
- ACC Noise, B. Millar, Tue, 6 Jun 2006 18:55:14
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