Okay - the continuing saga of 126 hvac systems. I had the system charged last year with R-12 and was assured it didn't leak. The guy told me the a/c worked very well, but he had left if running for hours to let the new charge take in the system. This year, I experience the same thing. The air is warm, and the center vents on the dash don't blow any air. As I drive, it finally starts coming out the center vents and just barely cools off. The problem is I don't use the car for long trips, so it NEVER gets cold in enough time. Any ideas?