I have had an issue with the 12v switch on my home. I turned it off one evening as I had no shore power and nobody was on board. Came back the next day, flipped the switch and nothing happened. Off, then back on. Called service tech who thought it might be bad solenoid (was past my pay grade). As we were talking, the 12v came back on by itself. Lit up and has worked since. As we are on a trip, I will not tempt fate again.
Panic is good to get the heart moving in the morning. Thanks for the comments above, I have learned a lot.
