How do I prepare my GSC470 dishwasher for winter storage in an unheated location?

Have a service technician remove fuses or trip circuit breakers to cut electrical power, then turn off the water supply and disconnect the water inlet line to drain it. The technician should also remove the water valve and blow on the small plastic outlet to remove water, then replace it, and remove the plug in the bottom of the rubber boot to drain it completely before replacing the plug. These steps prevent the machine from freezing during winter months. (Page 11)