[Dmitry at Pelican Parts]

Hello and welcome to the forum! I've attached a link to our site's DIY tech articles on the 964 platform. There are several articles on the a/c system, take a look at them to see if they help you troubleshoot. If you need more details, please post a Comment just below the article and we'll have someone get back to you with specifics. Best of luck!

Porsche 964 and Porsche 993 Technical Articles Directory (1989-1998) | DIY Maintenance and Repair Projects for Porsche 911 model years 1989-1998 | Pelican Parts