Frost-free freezer was frosting up

First I cut the gasket-fip with the wire cutters. Then I removed the gasket by pulling it away from the center if the door (not perpendicular to the door). I placed the new gasket over the door, secured the corners first, then pressed the rest of the gasket into place.

The repair to the refrigerator door (lower compartment) stopped the freezer from frosting (upper compartment), and it also reduced the time the compressor runs. However, I have the freezer turned to the lowest possible setting, and it still seems to be quite cold. There may be another issue w/ the unit such as the thermostat.