About 2 months ago I had a problem with my a/c blowing warm it turned out to be the evaporator...i got it fixed under the warranty i purchased...now yesterday I drove to work and my a/c was working fine...when i left work a few hours later my a/c is blowing warm again...the mechanic doesnt open til moday is there anything I could look at or check myself under the hood...I was looking to see if the compressor is turning on but im not sure which one it is..I am not the best wiith cars but I am learning...any help would be great for me thx everyone.....

 

is your a/c clutch working?

With the car off, look at the AC compressor. THere should be what looks like 3 holes that make a triangle. in those three holes should be 3 "pegs" that should sit directly in the center. If you can touch any of those pegs with your finger, and they are loose, (and you can move them around) your compressor is shot. (or at least the A/C clutch is)