I have never turned off or unplugged. However!.....My boss just had a horrible ordeal when she returned home from vacation and she HAD turned off the water. I don't know exactly how it happened, but somehow the water line to the ice maker on her freezer burst. She had over 10,000 gallons of water go through her house. They just returned back to the house after having to stay in a hotel for over 3 weeks while they took out every cabinet, pulled up all of the carpet, all of the floors, and took out most of the walls, and replaced everything. Now, I'm scared to death. I want to shut everything thing down when I leave home, lol. She said they always turn off that stuff, but never even thought about the ice maker. I guess if something is going to happen it's going to happen. ugh