Normally, you can find info on how to do a forced defrost for your model on your Tech Sheet. According to your owners manual, the Tech Sheet that is located under the front (grille) of the
If you can't find it, try this: Press Freezer Temp, then press Refrigerator Temp five times.
You can call Sears Home Services at 1-800-4-MY-HOME for repair.
Hope this helps!