My truck has an OldAire AC system from the 90's, still using R-12 freon. About 85-90 degrees in the shop today, the system blows 47 degree air. I measured the high and low pressures, low about 12-15 psi and the high about 225-240 psi depending on rpm. I can live with the 47 degree air but the pressures seem off, the low too low and the high too high. There are no bubbles in the sight glass. Any ideas if this is a problem waiting to happen or if I just drive it? I have several road trips planned this summer and hopefully trouble free. Thanks for your time.
Mark
