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Old 05-17-2018, 02:38 PM   #1
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Unhappy Hot Water Heater

Hello. I have a 2017 Jayco Seismic Wave 400W and today my hot water decided to stop running. My cold water works, but not hot. The tank gets hot and releases hot water from the release valve, but nothing else will. I assume this means it is a broken check release valve. Here is my question:
How do I access my hot water heater easily to get to this valve? Do I really have to start taking my RV apart to get to the hot water heater? Please help! Thank you in advance.
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Old 05-17-2018, 05:31 PM   #2
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Are you certain its not in bypass mode?
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Old 05-17-2018, 05:34 PM   #3
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Are you certain its not in bypass mode?
Positive. I had just taken a shower and then went to do dishes about 20 minutes later and there was nothing coming out the hot side. I checked the shower and bathroom sinks. Nothing. When I turn on the cold water, it works.
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Old 05-17-2018, 06:30 PM   #4
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Quote:
Originally Posted by Slgray84 View Post
Hello. I have a 2017 Jayco Seismic Wave 400W and today my hot water decided to stop running. My cold water works, but not hot. The tank gets hot and releases hot water from the release valve, but nothing else will. I assume this means it is a broken check release valve. Here is my question:
How do I access my hot water heater easily to get to this valve? Do I really have to start taking my RV apart to get to the hot water heater? Please help! Thank you in advance.
A 2017 should still be under warranty. Take it to the doctor first if you can.
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Old 05-17-2018, 08:58 PM   #5
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Do you have a tank or tankless heater? How many valves do you have for the bypass system? 2 and 3 valve bypass are the most common, and they do not have and check valve. I have only seen and heard of one time, of a single 3 way valve with a check valve system. If you have that configuration than maybe a check valve is stuck closed. If so, I would, flip the bypass valve, flow water through the pipes, and flip the bypass valve back to normal operation.

If you pressure relief is leaking hot water, that means you water pressure in the tank is extremely high. I might also pull the pressure relief valve to lower the pressure in the tank, but be careful of scalding hot water spray.
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Old 05-18-2018, 08:20 AM   #6
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Not sure if you did this but I would consider turning off the pump, relieving all pressure in the system and trying to drain water out of the hot water tank through the piping.

Another thought is to actually drain the hot water tank and if you can, flush it with some fresh water. Maybe connect to city water while drain open and let it flow out the drain hole.

The reason I suggest this you may have some junk in the system.
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Old 05-18-2018, 04:29 PM   #7
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I have 2017 Pinnacle 36KPTS. I experienced same problem. OPEN HOT WATER FAUCET AND NOT A DROP!
I found my check valve was stuck. There is a check valve on top of the water heater on the outlet line. Mine is plastic. I released enough water from the water heater so I could disconnect the line. Once the line was disconnected I removed the little valve inside and reconnected the line. Presto.....hot water.
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