Ge Monogram

I have a GE Monogram refrigerator and lately the cooler side haven’t been as cold as it should be. The temp says 54 degrees, funny thing is the freezer seems to be working fine. I checked the damper on the cooler side (top left corner) and it was blowing a lite bit of air but not enough, I realize the when I opened the freezer I start getting a lot of air the damper. Can anyone help me with this problem?