Thanks for all of the replies. You need to check to make sure that heated air is not being introduced to the air flow. It's possible that a little bit of heat could be leaking through. Warmed up the truck and my car and stuck thermometers in the vents. On the car it was 85 deg f; the truck was 90 de...

Hello, This is a truck that my father purchased used, back in the late 1990's. Between then and now, nothing has been done with the AC system. It always used to blow icicles...now not so much. Started noticing the drop in cooling performance in about the last year or so. Recently, I bought R12 gauge...