a/c update on 200q20v

Bob mx at snet.net
Thu Jul 12 14:03:50 EDT 2001

I had a similar problem, it was a case of it being overfilled and the high
pressure switch kicking in. Apparently on different circumstances (heat etc?)
there would be more pressure in the system. Purging out a very tiny bit cured
it for me,Its been fine ever since

Taylor wrote:

> at 11:27 AM 07/12/2001, Chris Covington had this to say,
> >Here's the update on my 200q20v.  It has been charged with Autofrost for a
> >week, it has held the charge the entire time, and the A/C clutch does
> >engage BUT the cooling works intermittently.  One day it will blow cold,
> >one day cool, the next day warm, etc.  I'm not sure if the clutch
> >engages on those instances during which it's not blowing cold, but it was
> >engaged when it was blowing cold.  Does this help to identify what the
> >problem could be?  People have suggested so far a multifunction switch,
> >the compressor clutch, and to check belts, etc.  Belts are fine.
> I had a similar problem with my '89 200.  I had the A/C recharged first as
> it had not been done before and sure enough it needed a gallon and a
> half!  I still had an intermittent, the problem went away for a week and a
> half and while sitting at idle with the A/C on when the better half went
> into the store for some ice, the A/C stop working again.  I replaced the
> multifuntion switch and so far so good.  I could tell by just looking at
> the sensor it needed to be replaced.  The boost is a bit stronger too!
> $95 at the dealer sucks... especially when I saw the following on eBay a
> day after!
> http://cgi.ebay.com/ebaymotors/aw-cgi/ebayISAPI.dll?ViewItem&item=593126797
> Taylor
> '89 Audi 200
> '01 Audi A6 2.7T
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