The power company put a power commander box on the side of my house for my 80 gallon water tank. Supposedly if there was hi demand for electric they would send out a signal to that box to cut the power to my water heater for a short time until the demand went down. We never went without hot water so we figured everything was working as planned.
One day we didn’t have any hot water. I checked the heating elements and we were getting no power to them. I checked the breaker and it wasn’t tripped. I went outside and took that power commander box apart. It was fake, the 220 line came out through the wall, went into that box where it made a u-turn and went back through the wall again and went to the water heater.
I took a second look at the breaker box, there was one 220 breaker that was unmarked and turned off. I turned that one back on and we had hot water.
Then I remembered I was adding more 220 circuits and had to move everything around to make room. I must have moved the water heater up one space but didn’t have a marker handy to Mark it, I’ll remember.