How do I winterize or store the dishwasher to prevent freezing damage?

To protect the dishwasher during summer months, turn off both the water supply and power supply to the dishwasher. If the dishwasher will be left in a seasonal dwelling or exposed to near-freezing temperatures, have it winterized by authorized service personnel. Note that damage from freezing ruptures of the fill valve is not covered by the warranty. (Page 20)