This started recently. I noticed it at the first couple of times the noise went away when i turned the ac on. But now it seems the noise goes away when it feels like it. Sometimes it even makes the noise while driving out of the blue. I put my hand behind the dash (around the radio area on the passenger side) and i feel something moving. It's clicking away with the ac blower i think. I felt a little metal bar and a plastic piece attached to it. I try holding the bar and it seems to stop for a bit. Any ideas?

 

Blend door, or the motor to it. That controls which vents the air comes out of. Try changing the vent directions & see if it changes.

 

?????

 

I have the same thing, I think its the fan that blows heat/air behind the glove box.

Most likely leaves getting stuck in it.