Had my a/c in my 95 850 Turbo Wagon charged and checked for leaks earlier this summer. Refrigerant was low and the system was recharged with no signs of leaks. Now it seems like sometimes the system is super cold, the next minute it shuts down and the air gets warm and humid. Cycling the temp setting usually doesn't get the system to kick back on but sometimes if I either cycle the a/c switch on and off or put the recirculate switch on, the air will get cold again. As of late, it seems that even that may not work, but after I shut down the car and get back in later and restart, the system is cold again. Any ideas why this is happening? Just when I think the a/c is shot, it blows cold, then I think it is OK and it goes warm. Strange.....

Keith