I just purchased a 1997 Dodge Roadtrek 190. It has a water heater but nothing I am seeing in the manuals tells about how to operate it. There is an on/off switch on the wall but I'm a little afraid of...
Open water heater outside access panel.......look at water heater See what brand/model it is (Atwood/Suburban------propane only/pilot or spark ignitor----propane and electric)
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Otherwise.. check valving on backside of water heater turn on water pump.......fill water heater by opening faucet hotside tuen on water heater and see what happens