There are two more items to verify: Are the external coils sanitised? If not, use a hoover to clean them of hair, dust, etc. Verify that the door seal is complete as well. Put a piece of ordinary paper between the refrigerator's body and door seal to check it. Should it come away excessively easy, the seal ought to be changed. This must be completed all the way around the door. A tiny air leak has the potential to overwhelm the system with excessive condensation. If unable to fix water leakage at home. You should go refrigerator repair shop rear you located.
