[s-cars] A/C problems

[Thomas R Green]

You probably need to clear all the codes before deciding which ones  
indicate a problem since I doubt you know how old some of them are.   
Then when you operate the system you will know which ones are  
currently reporting trouble.  The engine speed should come from the  
same sensor the instrument tachometer uses.  There is one on the A/C  
compressor for comparison for the belt slip fault code.  If this is a  
correct fault
reading, this is a problem that means the compressor is turning slower  
than it should be and the belt is slipping.  Whether it is a bad  
serpentine belt, faulty tensioner or compressor with too much  
resistance to rotation should be determined and corrected very soon or  
failure of the belt could be inconvenient if not disastrous.  This  
fault is preventing the compressor clutch from  staying engaged.

Tom


> On Thursday February 4 2010 at 12:21 PM George Verbyck <gerogeverbyck at yahoo.com 
> > wrote:
>
> Patient is a 93 S4, I am having trouble with my AC it will not stay  
> on, if I push the snowflake it illuminates but the second I take my  
> finger away it goes out , sometimes it will stay on a few seconds  
> but not usually. I checked the Climate control diagnostics and here  
> is what I came up with? Channel 1 , 11.7 central flap sporadic  
> block, 15.1 Air flap motor potentiometer static open * digital value  
> is programmed for limp home mode, 29.2 belt slip hard static and  
> channel 52 the 88.8 display shows g1,g2,g3 system function OK but  
> also d1 engine speed greater than 6000 rpms, this is at idle. I  
> believe d1 is my problem or at least the one which makes the AC non  
> functional. Where does it get its reading for rpm?? As far as the  
> rest what does this mean and where should I start to fix the  
> problem? Best Regards, George