Re[2]: A/C problems

[hhudson@rimail.interlan.com (HUDSON, HEIDI)]

My original posted problem: (1) a/c switch shuts off - light goes out and 
switch position moves, but a/c continues to blow cold air and (2) off 
position for blower still blows on low - will not shut off.

There have been responses about the Electronic Climate Control System, but 
unfortunately (or fortunately!) my 88 90Q has the standard/manual setup.  

Are any of the parts mentioned common to both systems and if not, what could 
be failing and causing the a/c and blower to stay on in a system without 
climate control?  

Any suggestions for how to narrow it down (sorry - no Bentley)

Thanks for the help
Heidi


>From Zafer:
> 
> >You didn't mention the year/model of your car. But if you have the Electronic
> >Climate Control System, it seems like the A/C Control Head is the culprit.
> >This is the part with the buttons and LED temp display. If you have the 
> >Bentley manual, you can run the diagnostics on the A/C and it should
> >display where the fault lies. If you don't have the Bentley, then the
> >dealer is the best choice. The Control Head costs around $350 or so at the 
> >dealer. Can get a used one from Shokan (800-ALL-AUDI) for about $200.
> >This part is made by the AC Delco Division of GM and is used in Cadillacs 
> >and Oldsmobiles too. If you find the right one at a GM dealer, it'll cost
     > >much less - around $150 for a rebuilt one. Replacement is 
     straight-forward. 
----------------------------------------------------------------- 
Zafer Mehmood       AT&T Bell Laboratories
zm@mhcnet.att.com      Murray Hill, NJ