Everyone likes to save money, and the power bill is a great place to start. If you're planning on being out of town for extended periods of time, you would likely think to turn off lights and appliances. But the refrigerator can be a huge power consumer in your home. Properly turning this beast off while you're away can yield significant savings when the electric bill comes around.
Empty everything out of the refrigerator. Any perishable items (meats, vegetables, fruits, breads, etc.) should be thrown out and taken out of the house to prevent rotting. Non-perishables can be stored elsewhere until you return.
Clean all surfaces in the fridge with a baking soda solution (1 tablespoon baking soda per 1 quart water) and the sponge. Wipe dry with a rag.
Unplug the refrigerator from the wall. If your refrigerator has a temperature control knob, set it to "Off." If it has an ice-maker, also turn off the ice-maker and the water-supply valve at the rear of the machine.
Place the open box of baking soda inside the refrigerator. Leave doors open to prevent mold and mildew forming.