Use the refrigerator properly
Refrigerators and freezers require large amounts of energy to chill foods. However, with a little care you can avoid waste without losing any of the benefits of this essential everyday comfort. Perhaps the greatest impact on energy use of a refrigerator is the temperature of the room it is in. A 10° F decrease in the ambient room temperature can decrease energy use by 40%.
Do not place your refrigerator or freezer near a heat source, such as an oven, a microwave placed on the appliance, a heater or radiator, or a south-facing window.
Also, take care not to place hot dishes in the refrigerator , or to overfit it. Make sure the door closes tightly-if the seal loosens at all, the cool air will escape, wasting energy. And if you hear the compressor come on a lot you may have a leak.