This is my daughters car, and from what I can tell, it is not blowing as cold as it should be. The compressor only comes on every minute or so for about 1-2 seconds at idle in the driveway. The charge on the low side is within limits while the compressor is engaged (1-2 seconds every minute or so), when not engaged to goes to the red band of the gage. From what I've read, the compressor needs to be engaged in order to charge the system correctly. Another problem is her fan staying on when the car is parked and killing her battery from time to time, not always. Thanks for any help