Date: Tue, 25 Apr 2000 22:12:10 +0200
From: "Massey Heide" <jemassenopsamne.no>
Subject: Re: Climate Control unit for 91 Saab 9000


What do you mean by broken? There is a special Saab manual for this and I have had a bit of problems myself with the ACC. The ACC is simply a computer controlled way of moving the same controls you would do manually via the rotary controls and switches: set air temp, distribution, recirc or not, air con on/off, rear window/mirrors on/off and fan speed. There are 2 additional motors (compared with the manual set-up) behind the dash that move the original controls for air temp (ie: mix of hot/cold) and distribution (screen, vents, footwells etc), according to what the ACC sensors tell it needs doing. The temp motor (especially) runs a lot as the system is always attempting to keep to your preset temp and it can wear out and seize up or move eratically, as mine did. I believe faults are normally confined to this and the sensors (or normal AC faults), but it should be obvious what is not working correctly. There is a combination of buttons you can press and hold in for a few seconds (I think it is top left and bottom right, but can't remember exactly) that runs a selftest program that returns a code for number of faults (should be 0) and then by pressing another button you get the fault code itself if there is one. Anyone remember the combinations to do this? Hope this helps. Jeremy Massey 88 9000T

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