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Old 08-15-2018, 10:20 PM   #1
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Water heater only hot water for a few seconds then cold

Let me preface this by saying I have read a lot of post of here about bypass valves in the wrong position but my bypass valves don't look anything like any other post please see the attached picture the trailer is new. After I have turned on the water heater and let the water get hot the water starts coming out hot but after a few seconds gets cold again. All of my shower valves are off not just on the head but at the knobs as well. I do have both switches inside the trailer and outside on the heater turned on and I know the tank is heating up. I have narrowed it down to this bypass valves situation. I have a feeling this should have 3 way valves installed inline to the water heater input and output connections however my valves are located before the water heater. Am I missing something? Or do I need to take th
it in and have them install the bypass differently?
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Old 08-15-2018, 10:29 PM   #2
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I've never seen a setup like that...

To bypass the water heater with that setup I would guess that both of those needs to be closed.

Maybe that is the new fangled way they are doing it now since a lot of people can't seem to figure out the 'old' way.
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Old 08-15-2018, 10:32 PM   #3
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Well if I shut both valves off then no antifreeze would get in to the hot water lines and if I leave even just one open it would fill the water heater with antifreeze. So my best guess is they installed the bypass valves incorrectly from factory it looks like a combination of a 2 valve bypass and a 3 valve bypass to me.
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Old 08-15-2018, 10:42 PM   #4
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I would just buy a valve and put it in myself.

If you take it in to the dealer...maybe you'll get it back by next summer!

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Old 08-15-2018, 10:42 PM   #5
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This is what I think was meant to be installed notice the 2 valves divert the flow past the water heater but are installed inline with the water heater connections

NO (OR LUKEWARM) HOT WATER -Please read first
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Old 08-15-2018, 10:45 PM   #6
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If I install a valve on the white hose it would solve my no hot water problem but i still would not have an effective bypass. Plus getting to that hose is nearly impossible. I took one of my drawers out to take that picture.
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Old 08-16-2018, 07:13 AM   #7
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FWIW, #5 is right. An immediate and temp fix would be a locking plier to clamp the white hose. If your under warranty I'd see about taking back to dealer or calling an onsite servicer.
But ultimately you need different valving.
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Old 08-16-2018, 07:32 AM   #8
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Looks like the incorrect valve was installed. For a two valve setup, one needs to be a two way. Easiest solution might be replace both valves with a 2 way with the second position being the bypass.
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Old 08-16-2018, 08:11 AM   #9
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Quote:
Originally Posted by Ryan9102 View Post
Let me preface this by saying I have read a lot of post of here about bypass valves in the wrong position but my bypass valves don't look anything like any other post please see the attached picture the trailer is new. After I have turned on the water heater and let the water get hot the water starts coming out hot but after a few seconds gets cold again. All of my shower valves are off not just on the head but at the knobs as well. I do have both switches inside the trailer and outside on the heater turned on and I know the tank is heating up. I have narrowed it down to this bypass valves situation. I have a feeling this should have 3 way valves installed inline to the water heater input and output connections however my valves are located before the water heater. Am I missing something? Or do I need to take th
it in and have them install the bypass differently?
I agree that this looks extremely incorrect. If you have the bottom (blue) valve open to allow water into the tank, it's at the same time also allowing water into the white bypass line.....which then flows into the red hot water and the outlet line from the tank.

You have to have the outlet (red) valve open to allow hot water from the tank, but this at the same time is allowing cold water from the bypass line in too...so you will always have cold water mixing in the hot water.

Looks like a trip to the dealer is going to be necessitated.
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Old 08-16-2018, 08:31 AM   #10
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I agree, the setup is completely wrong, and it needs to be fixed. Since it's under warranty, I'd take it to the dealer, but then again, I know my dealer will get stuff like this done in a timely manner. As John mentioned, a lousy dealer (actually, their service dept) might end up keeping your rig for a while.

The fix itself is fairly straight forward, and should only take, say, an afternoon, but I'd still prefer to have the dealer deal with it, since you want to make sure it's documented as a warranty item.
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