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Defrost Systems in Household Refrigerators. The process of removing the ice or frost from the evaporator or freezer is called as defrosting. The automatic controls employed in the present day refrigerators to prevent the formation of frost on the evaporators are called as the defrost systems. slide 2 of 5.
Samsung refrigerators with automatic defrost features usually defrost themselves every eight to 10 hours. An automatic defrost refrigerator may need a manual defrosting when the automatic defrost feature malfunctions, when the freezer and refrigerator compartments do not stay cold, or when sensors indicate other problems due to frost accumulation.