Automatic Energy Select Swtich
If the relay doesn't end up being bad, I wonder if it is just corroded terminals. It appears based on what you describe that your water heater is 110v electric and I suppose it probably is electric and propane, right? Is there also a separate water heater 110v switch or does it automatically go to 110v when the RV is plugged in? The problem could also be the water heater itself if somehow it isn't switching over to 110v or has a bad electric heating element or failed controller and there is an amperage draw problem. Will be interesting to hear what they find.
History: '08 View, '05 Chinook, '01 Jamboree 24D, '78 Apache Popup, 81 Komfort Tlr,
84 Mazda B2000 'w canopy,
Tent from wedding shower in '96