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How to save energy with your appliances 
Make sure that your refrigerator has a few inches of space behind it so air can circulate around the condenser coils. 
The appliance that uses the most energy is the refrigerator. 
Dusty condenser coils cause your refrigerator to work harder, leading to higher bills, and a shorter life for the fridge.
Clean them with a vacuum, duster, or a cleaner every three months to ensure it is running efficiently. If you have pets clean it every month.