If your Samsung Refrigerator cabinet is not cooling properly, the evaporator fan could be damaged, causing the air from the evaporator cabinet not to circulate properly. Samsung has multiple types of fans with different part numbers and fan speeds, based on the refrigerator cabinet size. The DA81-06013A is the most popular style of fan that goes behind the plastic evaporator panel.
Please refer to "Variants" and pictures to correlate model numbers. All listings are for refrigerator evaporator fans, but there are multiple styles available from Samsung.