Sometimes it seems like the air flow from my vents is restricted, more so after the a/c has been on for some time. I suspect the evaporator is freezing up, but the dash needs to be removed to look. The low pressure line does develop some frost. I took pressure readings, upon starting the car it was about 35/175 psi and after about 15 minutes was at 30/155 psi (high side seems a little low to me) at 80F ambient and about 60% humidity. This was with max A/C and blower at max. The temperature at the vent, using a digital meat thermometer, can get down to 28F (seems like that temperature should be closer to 32) if the fan is on low, or the low 30's if at higher settings. I had a major leak a year ago and replaced compressor, accumulator, and orific tube. I evacuated, purged the transfer lines, and filled with the 1.5 lbs recommended weight. I figure the possible causes are low refrigerent, dirty evaporator, or I have heard maybe air in the lines. I have wondered about some sort of switch that is supposed to turn off the compressor automatically, but I am not sure if 2001's had that. Any thoughts? I'm experienced enough to know some of the details of normal funtion. I usually throroughly research it, but some of this is hard to find for sunfires.
have the same problem?
Wednesday, June 29th, 2011 AT 1:49 PM