khs: Sorry I haven't had a chance to check out the pully yet to see if it's engaging and disengaging properly - I have been busy moving (from Austin, TX to Houston, TX). I'll try to check it out tomorrow and let you know something. However, I always keep my vent mode swtich set on the facial vent position, and according to what I gathered from PNUTMNM, this explains why I think my A/C switch is working like it should.