It started "tapping" every time I turn on the air, and even when I don't have it on. I've narrowed it down to the "rec/max" vent on the passenger side floor board. Now the question is, has this happened to anyone else and what did you do? When I say tapping, it sounds like there's a little munchkin tapping on the dash with a screwdriver. I'm sure it's the teeth stripping out. Basically, the relay motor for the vent flap doesn't know when to stop turning and that's causing the tapping. HELP!! I want to fix it myself, but if I can't then I need to get it to the shop.