As I have seen repeatedly in this forum, my 1995 850 turbo evaporator also died after the first four years. However, after six more years, the AC had been working well, although this summer it started taking a longer while until it would (always) cool. Then, I decided to recharge it (since after testing it looked like it was a bit low in freon). I used the $20 kit and followed all procedures. Also, during the recharging I had the can upside down and occasionally pressed the top-button of the freon-can.

After that, the pressure (and everything else I could check and think of) appeared to be OK. The AC temperature is definitely lower (effective apparent cooling); yet, something does not seem right. For example, the air coming into the cabin is now always very cool; yet the force at which it is coming into the cabin is on the weak side (the blower seems very sound and well, however). Further, one very hot and sticky afternoon, the rec and AC lights started flashing. B1 testing showed the code 121 (i.e., outside temperature sensor shorted to ground). I reset it the standard way, and those two lights have not come back on flashing again. Yet, the effective/ineffective cooling remains to be the same.

From my research and understanding of the system, my current thinking is that during recharging I might have (accidently) added a little freon in the liquid phase (prior to the compressor), and that might be the root of my AC experiences. Are there any other ideas or suggestions about what it might be and how to fix it? If I knew how to entirely evacuate the AC system, then I could recharge it and check my assumption of a bit liquid prior to the compressor. Any help or suggestions please?

Other than this, it has been a great car after 125k miles.