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Old 04-04-2014, 09:56 AM   #15
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2012 25' FB Eddie Bauer
Fairbanks , Alaska
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To the OP original question, if you have any hot water at all, like the one cup you say you get it shouldn't be a by pass valve problem at all. If so how did that cupful get hot?

This sounds like the classic Atwood XT mixing valve problem as this is exactly what happens when they malfunction. There are at least one thread on these heaters and valve problems on the forum so search for them and you should find more help. I have my own fix for them but it involves a drill and some pipe caps and you can't go back once you do the fix😁

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Old 04-04-2014, 07:32 PM   #16
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Alexandria , Virginia
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TG Twinkie and richw46,

Many thanks! I now have hot water! I found the bypass valve! I also found the plug that belongs in the hw water tank drain. Success!

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Old 04-04-2014, 08:28 PM   #17
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Originally Posted by crisen View Post
To the OP original question, if you have any hot water at all, like the one cup you say you get it shouldn't be a by pass valve problem at all. If so how did that cupful get hot?
The valve is between the the inlet and outlet of the HW heater. With all 3 open the water just above the heater gets warm but when the water is turned on it travels across the bypass instead of going all to the water heater. Closing the bypass forces cold water into the heater and the hot water out of the heater.

Until it happened to us, my thinking was the same as yours. It happened on our first trip and I knew exactly where to go to resolve the problem. Thanks to the forum for helping me, glad I could pass it along.


Rich & Yvonne
2006 Safari SE -Dora-
2004 4Runner SE

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