Norcold won't shut off
Very possible that low dc voltage has caused relay on main power supply board to lock on and wont disengage. If that is it new main board should solve problem but not cheap. To resolve at no cost locate coach 12 volt distribution panel and find fuse that feeds frig circuit and remove. That will shut off frig. Just for fun reinsert fuse and try frig thru complete selection and try to shut off,also hold for 4-5 sec.If still wont shut off just do fuse trick whenever you need to shut down frig. Good luck.