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Frost Free Fridge Freezer Frost-free fridge freezers work by constantly circulating cool air throughout the freezer compartment and refrigerator. This makes it unnecessary to manually defrost. These heaters are used to stop ice from forming on cooling coils. The heaters are switched off and on frequently. This draws more power. Make sure your freezer is well-organized to reduce the chance of frosting. Labelling the shelves and drawers with the food types will help you find things quickly. Cost Frost-free