I am not familiar with your coach or its specific components. If we are talking about a tank model (not instant) usually the hot water heater thermostat is a factory temp specific unit. You can change them to get a different temp.......but just use less hot and turn up the cold to mix for comfort. If you are cheap like me and you cant stand the too hot you can play with the winterization bypass valve to allow a little cold water to sneak by the hot water tank process.......no new thermostat required.
Seeing as you have a new coach it is probably an instant hot water tank so I would check the manual for your unit and see if they spec a recommended method of reducing water temperature. They probably use a high limit thermostat as well though.
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