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Old 06-18-2019, 04:33 PM   #1
shooter
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M.O.C. #21314
Strange Water Heater Problem

HELP !!!
The water on my Montana 5th Wheel has me baffled. First, I had almost no flow from any of the hot outlets. Sink, Shower, bathroom sink. That problem was corrected. A few weeks later, no hot water. I was running on electric. I replaced the heating element. Bleed the air out of tank, turn on the electric switch, wait a couple of hours and I have hot water. BUT, it only lasts a short while. I can wash my hands and the water gets cold before my hands are rinsed. I turned off the electric switch and turned on the propane. The water heater lit, stayed on 40 minutes, washed my hands with the same result. Cold water before my hands were rinsed.
Am I not getting all the air out of the tank ? Is the thermostat bad as in kicking off before all the water is heated ? Or, is the check valve on the water heater bad and not letting the water fill up ?
Thanks for any and all help.
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Old 06-18-2019, 06:11 PM   #2
speedster100
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M.O.C. #17566
Sounds like one of your check valves is not holding on the tank and allowing the cold water to infiltrate the hot line through it.
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Old 06-18-2019, 07:06 PM   #3
shooter
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M.O.C. #21314
So, you are saying there is more than one check valve ?
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Old 06-18-2019, 07:16 PM   #4
speedster100
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M.O.C. #17566
two on the hot water tank, one on the upper line and one on the lower line... They are there for winterizing through the onboard system.
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Old 06-19-2019, 03:00 AM   #5
shooter
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M.O.C. #21314
OK, thanks.
I downloaded the water heater manual so I'll find them there.
It may be a couple of weeks before I get back to the lake due
to work.
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Old 06-20-2019, 11:39 AM   #6
rohrmann
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M.O.C. #12947
Quote:
Originally Posted by speedster100 View Post
two on the hot water tank, one on the upper line and one on the lower line... They are there for winterizing through the onboard system.

The hot water outlet is the only one with a check valve. The hot water heater bypass valve in the convenience center turns off water to the water heater tank, and the hot outlet check valve keeps water from backflowing into the tank when you winterize the rig.
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