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Old 03-17-2010, 07:27 PM   #1
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hot water stopped running

Back again oh, wise ones! We are in Omaha, Nebraska. Settled in, had dinner and as Fred was washing the dishes, the hot water just stopped. We checked the tank and there is water in it. But the water will not run through the kitchen or bathroom faucets. The cold water does??? Clueless.......
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Old 03-17-2010, 07:31 PM   #2
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Hmmm...

At the top outlet on the WH, there is a check valve. It is designed to prevent water from going through the tank backwards. It is possible, that it is stuck. Another possibility, is that there is greater pressure on the back of that valve and is holding it closed.

That is the first place I would look...


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Old 03-17-2010, 07:41 PM   #3
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hot water tank

so, I should open the valve???? I'll try....
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Old 03-17-2010, 07:44 PM   #4
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hot water

I opened the valve and hot water came out
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Old 03-17-2010, 07:53 PM   #5
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Re: hot water tank

Quote:
Originally Posted by janetpowell
so, I should open the valve???? I'll try....
Which valve did you open?
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Old 03-17-2010, 07:55 PM   #6
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hot water tank

I tried both valves, the pressure release valve and the one that drains the tank.
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Old 03-17-2010, 08:05 PM   #7
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Re: hot water tank

Quote:
Originally Posted by janetpowell
I tried both valves, the pressure release valve and the one that drains the tank.
The one I'm referring to, is on the other side of the tank. It's where the hot water comes out of the tank and goes into the red water line. I you have a bypass kit, it would be between the top of that and the tank itself.


If you got hot water from the relief valve, then the WH is working. Chances are, that the check valve is stuck closed.

In this picture, it's the brass piece in the upper-left. Next to the corner brackets. It will be screwed into the top outlet of the tank itself.

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Old 03-17-2010, 08:09 PM   #8
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One thing you can try, to see if pressure is the only thing holding it closed....

Open the cold water valves in the bathroom... Shower and sink. While they are both open, try the hot water at the kitchen sink.

Hopefully, there will be less pressure on the cold side and you will get hot water at the sink. That might free up the valve, enough to work.

If not, you will need to find another check valve and replace it. They call them "Backflow preventers" now...
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Old 03-17-2010, 08:36 PM   #9
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hot water

we tried turning on the cold water in the bathroom and sink. Still nothing from the hot water side. We are not exactly "mechanical", so we may have to find a mobile repair person to help us out on this one. When Fred opens the pressure valve hot water comes spraying out. This is the valve you are talking about??? Thanks!
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Old 03-17-2010, 08:36 PM   #10
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The check valve is usually the problem, as Ed said. You can see the check valve in this picture. Sometimes a "whack side the head" ... or a few taps on the side with a wrench ... will unstick it if you are lucky.

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Old 03-17-2010, 08:43 PM   #11
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I should have added that the inside of that brass valve has a plunger type thing held by a spring.

Some people have removed the PEX coupling at the valve and pushed inward a bit to free up the plunger if the tapping doesn't work, and some have just mangled the plunger to keep it open but it needs to be replaced to winterize later.

If you do remove the outlet coupling, release the pressure first by opening the outside drain after turning off the water heater.

Good luck,

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Old 03-17-2010, 08:44 PM   #12
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hot water

Fred found the check valve and has given it a few good whacks....nothing.....
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Old 03-17-2010, 08:47 PM   #13
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Re: hot water

Quote:
Originally Posted by janetpowell
Fred found the check valve and has given it a few good whacks....nothing.....
Bummer You might be able to push out the plunger ... release the pressure first.
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Old 03-17-2010, 08:58 PM   #14
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hot water

sooo, now we know what Fred needs to do, but not tonight. We are in Omaha, Nebraska for the Division 1 Wrestling Championships. Fortunately, hot water can be obtained by heating a pot on the stove and the KOA has very nice hot showers. Fred will start on it in the morning, the water is way too hot to do anything with it right now. Not sure when we will get to the total repair....we are here until Sunday and then will travel home to PA. If he can fuss with the valve and get it working or mangle it until we get home.... Thank-you very much for your assistance!!!
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Old 03-17-2010, 09:11 PM   #15
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Be Careful the hot water heater is full of most likely 140F water.

While this may not open the check valve, it will help confirm the check valve is the problem.

The winter bypass valve. the white valve in Gary’s pic, between red and blue hoses.



If you flip that valve to bypass, it will bypass the hot water heater. Water should flow from the hot water faucets, but will be cold.

If no water flows with bypass flipped then the problem is deeper. If it flows, then 1 of 2 check valves can be stuck

The brass one on top that you have been whacking on.....

Or the gray one (normally gray plastic) on the inlet to the HW heater.

I would guess the top one is stuck first but I have heard others have had the bottom one stick closed and then water cannot get into the heater to even get out. They check both the in and out direction for different reasons.

To see if the bottom one is stuck, turn off the incoming city water and or pump. Put bypass back to normal operation. Open faucets to bleed all pressure out of the system. Turn HW heater OFF, both gas and electric. Then if the water have cooled down in the HW heater, and you have a drain valve open it, be care full the water may still be hot. The upper brass relief valve can be used too but put a pipe or gutter over it or you will drench your electrics.

Once all pressure is gone inside the hot Water heater below the safety relief valve. Then with the relief valve open, slowly turn on the incoming water to the camper. New fresh water should flow into the heater and out the relief valve. If it does then you know the inlet check is open. If it does not and the bypass is closed, then the inlet check is stuck and cannot let any water in. If water goes in, comes out the relief valve and not come out the faucets, then the top outlet check is the issue.

A possible get it going fix once you know which valve is stuck….

If you let the HW heater cool down so when the drain is open outside cold all water comes out, then bleed all pressure out of the HW heater and all water, with pump turned off and incoming fresh. Then unscrew the plastic fitting to both check valves and push the check opens to maybe break it loose.

The bottom one free flows into the HW heater, the top one free flows out of the HW heater.

If you do not follow the intent of what I’m saying, don’t try this. 140F water can give bad burns.

Good luck.

PS if you open the pipes, make 100% sure all pressure is gone, faucets open and HW heater is drained. If not there are 6 galloons of water in the HW heater that can come inside the camper. = Not good...
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Old 03-17-2010, 09:21 PM   #16
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Apology to Gary

In a previous post I mentioned Ed when I meant to say Gary.

Sorry Gary .... brain freeze from lack of camping
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Old 03-17-2010, 09:32 PM   #17
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hot water

Thanks John,
When we did turn the bypass valve we got cold water from the hot water taps. The rest of your answer we will explore more in the light of day.
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Old 03-18-2010, 02:35 PM   #18
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Hi janet

what year is your sunline my 02 have to valves for the winter by pass kit but I am not sure when they changed to the single one like my o5 has but if one is closed you will not get any hot water just a tought

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