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Old 11-07-2017, 02:07 PM   #1
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Strange water heater

Hey guys I need a little help. My 2016 Jayco has a 6 gal. gas/ele. Atwood water heater. I swear the first few times out I had hot water at all faucets. This past July I had no hot water at any faucets on a 3 day trip to the mountains. Just got back from a cross country trip (9100 miles) and here is the weird part; had hot enough water in the shower IF I didn't turn the cold faucet on at all. At the same time no hot water (or even warm) at the bathroom lavatory sink or the kitchen sink. As my cross-country trip progressed I had to start using a little cold water in the shower and the faucets in the bathroom, and kitchen started giving me lukewarm water. By the end of the trip the bathroom faucet was still lukewarm but you could almost call what was coming out of the kitchen sink very warm. Any ideas?
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Old 11-08-2017, 08:58 AM   #2
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I am surprised there has been no reply.

I fully suspect the issue is your bypass valve at the water is open. This will allow the cool water to mix in with the hot water. This is a fairly common issue, especially in the spring.
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Old 11-08-2017, 09:12 AM   #3
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Check your valves on the back of the HWT, should look like this with a 3 valve system.
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Old 11-13-2017, 04:42 AM   #4
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Either in the middle of '16 or '17, Jayco changed the valve system for the hot water heater. My '17 23RB, made during the latter half of the '17 production run, only has one valve to change to shut off the hot water system.

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Originally Posted by Sundancer330 View Post
Check your valves on the back of the HWT, should look like this with a 3 valve system.
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Old 11-13-2017, 08:20 AM   #5
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You might also check your outside shower to make sure it is turned off at the shower valve (both the hot and cold are completely turned off). I have read where the condition you describe can be caused by leaving the outside shower valves open while turning the flow of water off at the shower head and storing the shower hose in this condition. This apparently allows cold water to mix with hot water in the plumbing system and can cause the effect you are describing. It sounds strange but I would check to make sure that is not the problem.
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Old 11-14-2017, 06:35 AM   #6
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Good tips here, hope this clears up soon.
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Old 11-14-2017, 07:29 AM   #7
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A new wh bypass started being used by some mfg's a few years ago. They use 2-3way valves instead of 3-2way valves.
Both work the same, just less valves.

Here is a pic.
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Old 11-14-2017, 07:38 AM   #8
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I'm pretty sure my WH only has one valve. The outlet line from the WH must have a check valve in it. I'll take a closer look when I go visit it in the driveway later today.

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Originally Posted by norty1 View Post
A new wh bypass started being used by some mfg's a few years ago. They use 2-3way valves instead of 3-2way valves.
Both work the same, just less valves.

Here is a pic.
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Old 11-14-2017, 09:14 AM   #9
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My 2017 JayFlight has two valves. I just winterized it 4 days ago. My 2014 had three.
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Old 11-14-2017, 12:06 PM   #10
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Checked a few minutes ago. My setup definitely only has 1 valve to turn. No more, no less.

My trailer is a 2017 Jay Flight 23RB, and was built in the last half of the 2017 production year.

Quote:
Originally Posted by Atlee View Post
I'm pretty sure my WH only has one valve. The outlet line from the WH must have a check valve in it. I'll take a closer look when I go visit it in the driveway later today.
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