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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.
Manual defrost Samsung refrigerators need defrosting when the freezer coils and cover become covered with ice and the appliance is unable to maintain cool temperatures in either the freezer or refrigerator compartments. Defrosting once per month is generally sufficient to prevent frost from interfering with the unit operating normally.