A:Answer "Be sure,if the refrigerator has a rear cardboard cover, to replace it after service. If it is damaged, cut a new one from a cardboard box (prepared pizza delivery boxes work great!) The open fan cover grill areas are not critical but the solid ones are vital. These covers force air to be pulled over the hot condenser, cooling it, rather than being sucked in from open areas at the rear of the refrigerator. Without this cover it will overheat and may burn out the compressor."