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Old 05-10-2019, 10:46 AM   #1
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Hot water not working properly

So the hot water is on for awhile.
1). We will get a short amount of hot water.
2). The after awhile the hot water will stop and cold water.

Any ideas on what this could be?
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Old 05-10-2019, 10:48 AM   #2
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Check the outside show water is turned off at the knobs and not at the stop the water coming out of the shower head switch.

Matti
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Old 05-10-2019, 11:20 AM   #3
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Hot water not working properly

Your hot water mixing valve on the back of your Atwood hot water heater is toast.

See post 19 here on how to change it or clean it. I changed mine. Now I have a spare.

http://www.airforums.com/forums/f445...-177432-2.html
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Old 05-10-2019, 11:53 AM   #4
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Part number clarification

The Airstream part number in all of their parts books going back to 2015 or so is 690602-101. That part is 217.00 from a AS dealer.

I contacted Atwood to see if the Atwood mixing valve #90029 was the same. That valve is about $100.

Atwood confirmed back to me yesterday that the 90029 valve is the replacement part.

Randy

Message to Atwood: I have a 2018 Airstream Flying Cloud 23FB. The water heater (XT/6gal.) mixing valve in my parts book is 690602-101. I can't find that number anywhere for parts. I do find 90029 which appears similar. Will the 90029 mixing valve work for me as a replacement? Attached is the 90029 valve picture I found on line.

Answer from Atwood):


Randy,
The correct part number is 90029. You are under warranty so you can get into a service center and have them take care of this for you………
If you still want to purchase this you can find it by going to your search bar and typing……..atwood (make a space) then the part number. I just did this and found them to be readily available.

Thank you
Sharon

Sharon Babkoff
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Old 05-10-2019, 02:31 PM   #5
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Yep I called Airstreams and mixing valve the issue. I then called Atwood and they said to soak in White Vinegar since sometimes deposits build up. So I took off and am soaking it. We’ll see. The problem is no rv places carry that part. So I guess it is cold showers until I get one. And good luck coming getting anything serviced! Still under warranty but I am not going to wait. I can get part on Amazon for 120.
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Old 05-10-2019, 02:33 PM   #6
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PS Looks like a part to have an extra laying around��. Seems like a part that often fails.
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Old 05-10-2019, 02:52 PM   #7
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Quote:
Originally Posted by Daquenzer View Post
PS Looks like a part to have an extra laying around��. Seems like a part that often fails.
Yes Indeed. When my mixing valve screens were blocked, I purchased a new mixing valve and installed in 1 hour, and then cleaned the old unit back to the original condition. Vinegar only works on hard water deposits blocking the screens, my deposits were debris from the factory construction. I now have the old one as a backup.
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Old 05-10-2019, 03:28 PM   #8
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I purchased Part # 90029 from amazon for $120 arrived in 2 days with Prime.

https://www.amazon.com/Atwood-0213-1.../dp/B004QN15BA

For what it is worth mine was under warranty too, but I didn't want to wait 3 months for a dealer to make the time for me, and then break something else while trying to install it
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Old 05-10-2019, 05:14 PM   #9
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I purchased Part # 90029 from amazon for $120 arrived in 2 days with Prime.

https://www.amazon.com/Atwood-0213-1.../dp/B004QN15BA

For what it is worth mine was under warranty too, but I didn't want to wait 3 months for a dealer to make the time for me, and then break something else while trying to install it
I just ordered mine as well. Will be here Tuesday and take me 30 minutes to replace. Otherwise I have to mess with taking the trailer to the dealer 25 miles away, then sit around while they fix it, and then drive home. Not worth the headache. Lost time doing work would be hundreds of dollars since it would take over a half day minimum.

But I might just order another one for my plumbing kit I take on trips. Seems like this is a part that often fails. And when you are out camping, and no RV places stock them (I called around), it could be the difference between having a nice time and taking cold showers.

Thanks for all the feedback on this forum. Great source of information.
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Old 05-11-2019, 10:26 AM   #10
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Originally Posted by Daquenzer View Post
So the hot water is on for awhile.

1). We will get a short amount of hot water.

2). The after awhile the hot water will stop and cold water.



Any ideas on what this could be?


I just completed this repair. Remove the mixing valve, find the strainer/screen. Remove the calcium build up (I used an air compressor). Reinstall. Works great!
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Old 05-11-2019, 10:51 PM   #11
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I am wondering if the hot water heater mixing valve screens are even required or necessary. After all, the mixing valve will still function properly if the screens are fully removed. In fact the mixing valve would probably never fail again during the life of the Airstream trailer.
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Old 05-13-2019, 06:49 AM   #12
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I am wondering if the hot water heater mixing valve screens are even required or necessary. After all, the mixing valve will still function properly if the screens are fully removed. In fact the mixing valve would probably never fail again during the life of the Airstream trailer.


I think the valve screen is there to protect everything downstream from clogging with debris, including the valve. The same reason you have a strainer on the water pump supply line.
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Old 05-13-2019, 07:04 AM   #13
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I think the valve screen is there to protect everything downstream from clogging with debris, including the valve. The same reason you have a strainer on the water pump supply line.
Yes indeed, the screens are there to protect the plumbing. Then why press fit the screens, requiring full mixing valve replacement. I think I am going to drill out the screens, and then place a quality filter at the city water inlet, thus insuring this "mixing valve" headache does not appear again.
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Old 05-13-2019, 07:14 AM   #14
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Yes indeed, the screens are there to protect the plumbing. Then why press fit the screens, requiring full mixing valve replacement. I think I am going to drill out the screens, and then place a quality filter at the city water inlet, thus insuring this "mixing valve" headache does not appear again.
An external filter won't help with detritus on the mixing valve screen as it is lime scale that has flaked off the sides of the water heater.
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