The air hitting the inside of the window, with the air conditioning on, is so cold that the humid air on the outside condenses and freezes on the outside. Mine does the same thing. I guess it just shows you how good the air conditioner is on our Crossfires.

We had a maintainence forman at work that would explain that the water dripping off of the pipes in our shop during the summer as " the compensation dripping off the pipes caused by the high humility in the air. " Kind of the same thing.