Have you figured out what that ticking noise is ???? I have the same issue with mine it got so bad it sounded almost like a rat or something in my dash trying to get out.... I was a little freaked out... turns out there is a little lever under the passengerside of the dash that must control the vent movement... and it was caught up so the motor kept ticking... with a little bit of grease it was all good./.
I had this same kind of ticking....it ended up being the little paddle that changes the direction of the air on the passenger side near the fire wall behind the gear shift console. It was stuck on my vehicle. It finally corrected itself.