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Re: [CQ] R-134a A/C conversion?

>Bob.Sandy@USPTO.GOV wrote:
>> Has anyone ever attempted (and/or succeeded) converting their/an Audi
>> from R-12 to R134a?
>> The A/C in my 1991 Coupe Quattro just quit.  The climate control[ler]
>> seems to check out o.k. according to the fault diagnosis described in
>> the Bentley.  However, the compressor does not turn on.  I suspect the
>> system pressure is too low to turn the compressor on.
 If the coupe is like my 91 200q, I had a similiar sounding problem caused
by the multifunction switch. I believe it was telling the system it was too
hot, so the A/C would not come on.