Oy gevalt... 80 degrees already. Wanna trade temps?

The suction accumulator is the aluminum tank on the firewall. Often incorrectly referred to as the "receiver dryer"--which doesn't exist on a 700.

Since the pressostat is fine, there must be a problem elsewhere in the system. I'm sure a matter of methodical troubleshooting will highlight the problem without too much trouble.

You can get a new accumulator at most car supply places. Actually, often the Volvo dealer has them for the same price as local car shops. Price: around $50, sometimes even less than that. Put it this way... I went with a less expensive Parker unit last year. It functions perfectly, but it BARELY fits in the car, and I saved a whopping seven dollars. I would've coughed up the seven dollars for Volvo's piece if I'd known that when I started.
--
chris herbst, five volvos.