So I recharged my system last night and everything was doing well. I have never used the A/C before and I have owned the car for 4 years now. The system was plowing ice cold air last night and the compressor was running. Today I get into the car and drive it to work and I notice that the compressor is going on and off every few seconds. Is it a leak? Bad sensor? If I by pass the sensor on the top of the hose near the fire wall then the compressor will stay on.