My model 3921FB has an on-demand water heater, and the control for it is separate (upper right - see pic below) - not thru InCommand.
What model is your 2019 RV? That info would help you get better answers.
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MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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