What should I do to prepare my refrigerator for a long vacation?

Remove all food and unplug the refrigerator. Clean the interior with a baking soda solution (one tablespoon of baking soda to one quart of water) and leave the doors open. Set the icemaker power switch to the OFF position and shut off the water supply to the refrigerator. If the temperature can drop below freezing, have a qualified servicer drain the water supply system to prevent flooding damage.