Fan only uses front vents

I bought a 2012 c4 two years ago and I love it.

Suddenly I am unable to switch the air flow to feet or windshield. The windshield button makes it blow out the front vents.

Is there an actuator i can check for blockage? fuse(s) could i check to rule out? Could something have been unplugged?

 

With the engine off, I don't hear any movement. Approximately where is the possible culprit damper?

 

After some time, I did notice a weird noise coming from the passenger side. I removed the glove box and saw a little white plastic arm piece popped out of it's housing. I reseated the piece, and everything works again. Thanks for your help!

 

1) remove glove box
2) locate the actuator that switches the vents between the different pathways.
If you are having the same problem that I was, there should be a little white elbow that's clearly popped out of it's housing. Snap in back in and you should be good to go.

 

I only know about the Prius C, but it wouldn't surprise me if it was similar. Can you hear weird noises when you change which vent it's supposed to use? The weird noise is coming from the actuator which you should be able to see/ hear more clearly now that the glove box is removed. Use a flashlight to look under there while you change vent from one area to another.