So I have looked into this a bit and tried many suggestions like the door seal, cleaning out any dust, making sure the fan is working etc., but I still have the same issue. The freezer gets covered in frost and now the refrigerator is starting to warm... It is a Kenmore elite, freezer on the bottom # 596.71002100. It is about 5 years old. Any suggestions would be helpful, thanks!

WKNDHRO

Frost-eze

Frost in Freezer solved