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Old 04-03-2019, 04:55 AM   #1
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Yaphank , Arizona
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Hot water heater problem

After spring startup I'm only getting warm water from the fixtures the bypass valve is open. I can hear the water heater kick on but I'm getting only warm water. I have 2017 25 foot rear bedroom queen any suggestions I don't know where the mixing valve is located or what it looks like to tap on it.
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Old 04-03-2019, 09:53 PM   #2
CRH
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Shouldn't the bypass be closed?
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Old 04-04-2019, 02:51 AM   #3
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Originally Posted by scroon View Post
After spring startup I'm only getting warm water from the fixtures the bypass valve is open. I can hear the water heater kick on but I'm getting only warm water. I have 2017 25 foot rear bedroom queen any suggestions I don't know where the mixing valve is located or what it looks like to tap on it.
Was your AS winterized? If so, the technician/mechanic is the most direct feedback IMO. I would look under the bed, the bypass valve is attached to the water heater. Find the heater inside one of your exterior mechanical space doors, and work backwards from there to locate the valve.

Check your owner's manual for the location and function of your mixing valve.

Guessing your mixing valve is open, allowing the cold water supply to the water heater to mix with the hot water coming out of the heater.

See diagram in last post.

Good luck,

Peter
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Old 04-05-2019, 04:16 PM   #4
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The hot water heater is not bypassed I turned the valve to fill the water heater. The water is starting to get hotter but not scalding hot I'm thinking there is still air in the lines.
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Old 04-05-2019, 07:06 PM   #5
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The hot water heater is not bypassed I turned the valve to fill the water heater. The water is starting to get hotter but not scalding hot I'm thinking there is still air in the lines.
In your Airstream, can you see the three valves shown in Post #2?



. . . and what is the position of the three valves? The upper and lower valves should be open [handles over and parallel to the pipe], and the middle valve should be closed [perpendicular to the pipe]. Do your valves look like the top part of this image? If the middle valve is open, close it and see what happens.

Earlier you said in Post #1:
Quote:
Originally Posted by scroon View Post
. . .
. . . I don't know where the mixing valve is located or what it looks like to tap on it.
Are you now able to see your valves?

Thanks,

Peter

PS -- If you have opened all your hot/cold sink, shower, and toilet faucets etc. [and water ran out with no air], there is no air left in your lines.
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Old 04-05-2019, 07:21 PM   #6
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Originally Posted by OTRA15 View Post
In your Airstream, can you see the three valves shown in Post #2?



. . . and what is the position of the three valves? The upper and lower valves should be open [handles over and parallel to the pipe], and the middle valve should be closed [perpendicular to the pipe]. Do your valves look like the top part of this image? If he middle valve is open, close it and see what happens.

Earlier you said in Post #1:


Are you now able to see your valves?

Thanks,

Peter


PS -- If you have opened all your sink, shower, and toilet faucets etc., there is no air in your lines.
The 2017 AS doesn’t have the three valve bypass arrangement like earlier years. There is only one valve to turn to move it from bypass to use mode.

They can be damaged with too high air pressure when winterizing. The mixing valve doesn’t have a stellar reputation for longevity and may need to be replaced. Some technicians recommend removing the mixing valve and reverting to the three valve system. If this is done the thermostat in the water heater should be replaced with a lower temperature version. You will also reduce the volume usable hot water (6 gallons vs virtual 9 gallons).
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Old 04-05-2019, 07:26 PM   #7
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Thanks Ray, good points.

scroon, sorry for the mix-up. Good luck in the O. R. [see next post ]

Peter
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Old 04-05-2019, 07:27 PM   #8
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I don't have the three valve system just the one bypass valve I hope I don't need a bypass surgery
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Old 04-07-2019, 01:59 PM   #9
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Hot water heater problem

Correct the 2017 only has a single valve for the hot water heater feed, no more 3 valve bypass like my 2008 had.

Having the same issue with my 2017 ‘30. De-winterized today. Spurt of very hot water then just warm / cold flows with reduced pressure as compared to the cold line.

Traced issue back to the Atwood mixing valve ar the rear of the hot water heater.

Pain in the but need to get a new mixing valve, remove the dinette bench and some other trim, replace and put it all back together.

I’m under warranty so hoping airstream can just send me a new valve and I’ll do the work myself rather than waiting in line 3 months at the dealer only for them to mess something up.

New mixing valve is about $125 bucks if you are not under warranty. Here is a picture of the failed mixing valve.
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Old 04-07-2019, 02:33 PM   #10
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Ok I'll will try that
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Old 04-07-2019, 04:08 PM   #11
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Warm water

Check your outside shower. I have not experienced this but was warned during my dealer walk-through...If the outside shower hot & cold valves are open and the water turned off at the shower head (in which case little or no water is flowing), you will only get warm water anywhere else in the trailer. Something about the hot & cold valves being open allows the hot and cold water to mix producing only warm. It's a quick fix if that is the problem.
Good luck.
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Old 04-07-2019, 04:45 PM   #12
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Hot water heater problem

Quote:
Originally Posted by Malia20 View Post
Check your outside shower. I have not experienced this but was warned during my dealer walk-through...If the outside shower hot & cold valves are open and the water turned off at the shower head (in which case little or no water is flowing), you will only get warm water anywhere else in the trailer. Something about the hot & cold valves being open allows the hot and cold water to mix producing only warm. It's a quick fix if that is the problem.
Good luck.


Correct, part of the troubleshooting process. My outside shower faucets were closed but good call out.
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Old 04-08-2019, 10:40 AM   #13
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Will do thanks guys
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