After we'd spent a few years living in a Pam Dawsonesque starter house, we had our first new home built.
I bit the bullet and paid for premium appliances, so I was a little upset after we moved in and the first time using it the dishwasher wouldn't run.
I called the builder, and he said he'd come out first thing in the morning to take a look, and would replace it if necessary.
He showed up as promised and looked at the dishwasher for a few seconds.
Then he walked over, flipped a wall switch beside the sink, and the dishwasher came to life.
I'd never seen a dishwasher with an on/off switch on the wall. I installed the one at our first house, and wired a wall outlet for it.
Felt dumb as hell.