I've been reading around and I think I've figured out my a/c issue but due to my rather novice knowledge I'd be interesting in hearing some other opinons.
Oh, my car is a 2001 Subaru Legacy L with 220,000km on it.
Air conditioning worked last summer, there was a warm spell early in the summer and the a/c seems to work decently enough but I only used it for five or ten minutes. Now that summer has set in I went to turn it on a couple weeks ago and nothing happened. It still blew air but nothing cold, compressor didn't turn on and clutch (?) didn't do anything. I turned to the Internet, my Hayes manual and USMB.
First thing I found to do was clip the two green plugs togethor under the steering wheel. Both fans on the rad turned on and off as they should and the relay seemed to work for the a/c.
Went back to do more research and came back out. Took the caps off the pressure lines for the a/c and stuck a screwdriver onto the pins. Both gave a hiss, so not completely empty. I only did each for half a second, didn't want any getting out that didn't need to.
After some more reading the third thing I tried was jumping the pressure switch located near the back of the passenger side of the engine compartment. Unplugged the cord, jumped the contacts and pressed the a/c button. The compressor came on and clutch caught. I tried turning off and on the a/c by the button a few times and the compressor and clutch went off and on. I let it run for a few minutes (with the a/c on) but it just blew warmish air. From my reading if jumping that works then it could be two things, either the switch or low freon.
Since jumping the pressure switch worked but it only blew warmish air even though there was still some pressure in the system I'm guessing low freon is my problem.
Would anyone with more experience care to comment? Hopefully I'm on the right track. Thanks!