The hot water in our RV suddenly stopped working. The water wasn’t cold; there was actually NO water coming out of the faucet. The cold water was working just fine. After doing a Google search, I was able to narrow the problem down to a malfunctioning check valve on the hot water heater. This valve allows water to flow out of the water heater but not back in. Since it is a mechanical part with moving pieces, they can break down and malfunction over time.
Fortunately, replacing one was rather inexpensive, around $5 to $10. A check valve for an RV hot water heater can be purchased through Amazon. I made a video of the whole process replacing my check valve. You can fix this problem yourself should this arise.
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