[SmittyC]

My 2000 Venture sometimes hisses from the engine for a few minutes after shutting off the motor while running around with the a/c on, like it is letting out pressure or something. I'm no rocket scientist but you may want to make sure that your a/c cabin filter is clean and that nothing is blocking it, making a similar noise. Ours was stuffed full of leaves and crud one year and it was making a noise. Hope you fiquire it out, at least it works!