I have a 2006 Toyota Sienna that is giving me a/c trouble. There were no leaks detected and is completely charged. The trouble is while I am driving the a/c blows cold air (45 degrees). But when the car is in park but still running, the a/c stops blowing cold air. Once I put the car back into drive, the a/c begins to blow cold air again. Can anyone point me in the right direction as to what the problem may be???

Thanks, jlou118