Air conditioner is only blowing towards the feet vents
 

Hi all,

I have a 2007 G35 coupe. I recently noticed when I turn on the AC, there is no air coming out at all from the normal (top) vents. It's on'y blowing towards the feet. I switched the AC mode to all levels including defrost vents, and it's still only blowing toward bottom vents. The vents are OPEN and not closed via the dash adjusters. It used to work perfectly but one day it just stopped working.

I can hear the AC motor running when I turn it on but no air comes out of the top vents. Can anyone give me some guidance?

Not sure if how it could break, but aren't there gears back there or something that rotate and spin where the air goes?

Any solutions guys?
I checked the AC again and it only blowing to the feet and defroster, but not the face vents?
Please guys help..it's really hot out here 90c