A refrigerator - even a new one - is one of the biggest users of electricity in your home. As it ages, it gradually becomes less efficient and has to work harder, which mean more electric consumption. It usually pays to replace a refrigerator when it's 12 to 15 years old. The money you invest in a new refrigerator will be repaid in about 5-6 years by the money you save on electricity (not to mention the cost of repair bills to fix an aging appliance).

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