Appliance411 major home appliance parts, repair and service information for consumers. Use the energy saver switch on newer models. This controls an electric heater built into the front perimeter of the cabinet. In humid weather it keeps moisture from collecting there, but is seldom required in the dry winter months. When putting freshly washed vegetables into the fridge, dry them before hand.
Excessive moisture can make the appliance work harder and use more energy.
To find out if your refrigerator is keeping the proper temperature, put a container of water on the middle shelf. Let it stand over night and then test the water temperature. Because the air temperature varies so widely, this is the only accurate way to find out. If you have to transport the fridge you can lay it on its side. It's best if the hinges are at the top so the doors don't fall open.