GE Cafe Refrigerator not cooling properly/ice build up inside by vents

Refrigerator & Freezer Repair
1

Over the weekend I noticed that my refrigerator GE Cafe CYE23TSDSS started building up ice inside by the vents and wasn’t cooling properly.

The freezer has no build up, but I think it’s not cooling much anymore..after doing some grocery shopping yesterday and putting meatballs in the freezer, they didn’t seem frozen the next day.

I checked the seals around the doors and everything seems fine. Had the refrigerator only about two years.

Started taking it apart to defrost everything, here are some pictures:
refrigerator - Album on Imgur

What could be the problem here?

2

So every two months the refrigerator keeps building up ice and I have to defrost it.
Why is that happening?

http://i.imgur.com/JiMHEFU.jpg

3

[QUOTE=september;894254]So every two months the refrigerator keeps building up ice and I have to defrost it.
Why is that happening?

http://i.imgur.com/JiMHEFU.jpg[/QUOTE]

Maybe ice is blocking the vents which prevents proper air flow.

4

The frost is what’s causing it, but why is the frost building up?