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Frost Free Fridge Freezers Frost-free fridge freezers employ a fan to circulate air, thus preventing frost forming on the freezer evaporator. If ice forms on the evaporator then it will hinder air flow and cooling problems will develop. This could block food flow as well as alter the taste and odor and take up space. This can also make the fridge work harder and consume more electricity. Cost Frost-free freezers do away with manual defrosting which can be a lengthy task. Defrosting