‘Energy Star‘ has a neat tool to calculate the money savings that can be realized when purchasing a new refrigerator. The Savings Calculator allows you to enter you local electricity rate and what type of refrigerator you currently own, then calculates what the savings would be with a new refrigerator. The money saved running a new refrigerator compared to say a 10 year old model are quite substantial.
Of course, as a service man, my advice to you is to repair that old unit.
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