What should I do to winterize or protect the GSD4500 dishwasher from freezing?

If the dishwasher will be left in an unheated place during winter, have a service technician cut off electrical power, remove fuses or trip the circuit breaker, and turn off the water supply and disconnect the water inlet line to drain remaining water. The technician should also remove the plastic sump cover in the tub bottom and use a sponge to soak up water in the rubber boot. (Page 10)