Heat/AC airflow buttons clicking

[WAAPSSH]

Hey I recently bought an s14 zenki and when you push a button for the heat/AC airflow it will be fine for about 2 or 3 seconds then it will constantly sound like some kind of switch in the dash is jumping. It does this for every button (front defrost, feet, head, etc.) except for the option for both feet and head, for some reason that button is fine. This happens when the air is turned off too.
It's pretty effin annoying so if anybody could offer any kind of help, it'd be greatly appreciated.
Thanks

[projectRDM]

Defective mode door motor. Replace it.

[WAAPSSH]

Can I get one at my friendly Nissan dealer, or do I need to search the web?

[WAAPSSH]

So I found the mode actuator and took it out and was planning on picking one up from Nissan a couple days later, but found that, somehow, everything works fine without it...and obviously there's no noise. So I guess if anybody else has this problem, just take it out. j
By the way, it's a black box with a yellowish arm on top and it's right behind the stereo and isn't all too hard to get out.