the a/c compressor was replaced summer 2007. i went on a one week vacation. i started the truck for the first time and got hot air instead of a/c. the relay is fine. the compressor is cycling. i went and got a can of a/c with the gauge on the top.
when i hooked up the can it warned me not to add freon. the gauge went into the yellow area/seek professional help.
any suggestions ?