In our 2022 FC30, we usually have to run water in the bathroom sink to kick on the water heater, then turn on the kitchen sink, then turn the bathroom sink off. This is when hooked up to city water. There's something about not enough flow to the kitchen to activate the pressure sensor on the water heater. When using the water pump, no issues at all.
Probably not the solution you're looking for, but at least you know you're not alone. There is a design flaw somewhere. -Ari
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