Need a little A/C help! My A/C works when it wants to. Sometimes when I turn it on the compressor won't come on at all. Sometimes if I rev the motor it will come on and sometimes not. When it comes on it stays on and the air is nice and cold. Also the fan doesn't work on high. It did this before and when I adjusted the TPS it started working right, even the high setting worked. Now that it's over 100 degrees, I can't get the stupid thing to work at all. Any A/C smart folks got any ideas?? HELP!!! This black car gets REALLY HOT!! Thanks in advance