Model Number:
Brand: Brand
Age: Less than 1 year

Model Number: 253.74223700
Brand: Sears Kenmore
Age: More than 10 years

I have a kenmore refrigerator/freezer that is about 10-12 years old. Model 253.74223700 , it randomly thaws in the freezer then works fine for a few weeks and then thaws again. The refrigerator will occasionally freeze on the top shelf but that may be because I turned the temp control as low as it will go to keep the freezer frozen. What is wrong with this thing?