I noticed that my Frigidare refrig. Was not getting very cold but the freezer was working fine. I took the back cover in the freezer off and de-thawed the coils. I replaced the defrost switch in the refrigerator but it looks like the ice is still building up on the back wall of the freezer. Any suggestions? Thanks.

Do you have a fan that moves air from the freezer to the refrigerator compartment and are all of the ducts clear.

By the way think about what de-thawed would mean if it were a word.