Refrigerant Circuit, Converting R12 To R134A And Servicing
WARNING: This page is about a different car, the 2022 Audi S3, 2022 Audi RS 3, 2022 Audi A3 Quattro, and 2022 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For environmental reasons and on account of the corresponding legislation, refrigerant R12 can no longer be manufactured or supplied. Refrigerant R134a has been developed as a replacement for R12.
A/C systems developed and designed for refrigerant R12 cannot however simply be charged with refrigerant R134a. To ensure trouble-free operation of the air conditioning system even after conversion, various components of the refrigerant circuit must be replaced.
A precise description of the conversion procedure and information on the servicing of converted refrigerant circuits can be found in Service Information: Air Conditioner with Refrigerant R12 Parts 2 and 3. (This Service Information is only available in hard copy).