Foul Smell When Air Conditioner is Turned ON

I own a 2007 Prius. Every time I first turned on the AC, had a foul, damp smell coming out of the vents. After bringing it to be checked out by the Dealer, it turned out that the factory forgot to remove a plug from the AC condensate line. In other words, condensate was building up and sloshing around in the line and causing the foul smell.
Now, after removing the plug, I finally notice condensate on the garage floor and no more foul smell.
Moral of the story - make sure that you see condensate under your car after using your AC. Otherwise, your line may still be plugged.
eace: