Hot water coming out of cold water side

Comments

• ScottG Administrator Posts: 5,640

  December 2017 edited December 2017

  Any chance you left the Alde bypass open when you dewinterized?

  2015 T@B Max S (320)
  2015 Nissan Frontier SV V6 4x4

  0 · Share on FacebookShare on Twitter Share on Google+
• cooper31525 Member Posts: 14

  December 2017

  Thanks Scott.  Having a valve in the wrong position was my first thought too but I have gone through this manual a few times with no luck.  https://us.v-cdn.net/5021717/uploads/editor/lm/17m30l0a7xvi.pdf  Maybe I should check again.  I may be missing something in the directions.

  0 · Share on FacebookShare on Twitter Share on Google+
• ScottG Administrator Posts: 5,640

  December 2017

  The Alde bypass valve is labelled in the first photo in your link. It should be turned so it is perpendicular to the pipe (the specific direction doesn't matter, however). Forgive me if I'm stating the obvious.
  
  If the bypass valve checks out, than I would turn my suspicions to the mixing valve.  

  2015 T@B Max S (320)
  2015 Nissan Frontier SV V6 4x4

  0 · Share on FacebookShare on Twitter Share on Google+
• cooper31525 Member Posts: 14

  December 2017

  Thanks again.  I will double-check the valves and if that doesn’t work, I’ll try the mixing valve. I’m guessing the mixing valve would be a replace instead of repair, right?  I guess the only “repair” would be if an object has somehow worked its way into the valve and then I could remove it.

  0 · Share on FacebookShare on Twitter Share on Google+
• ScottG Administrator Posts: 5,640

  December 2017

  I think it would be a replacement, but I'm not certain. Mine is a 2015, built before the mixing valves were incorporated.
  
  Good luck and please let us know what you find.

  2015 T@B Max S (320)
  2015 Nissan Frontier SV V6 4x4

  0 · Share on FacebookShare on Twitter Share on Google+
• cooper31525 Member Posts: 14

  December 2017

  Will do.

  0 · Share on FacebookShare on Twitter Share on Google+
• JohnDanielsCPA Member Posts: 238

  December 2017

  I need to better understand this - the mixing valve determines how hot the water will be by mixing hot and cold water together, then sending that water down the hot water line to your sink.  It should not be impacting the cold water line at all.  So if you have the cold water on but are getting intermittent hot water, that does not make sense to me understanding how the plumbing works.  Is it possible that you do not have the cold on all the way at the faucet, so you are getting hot mixed in with the cold at the faucet somehow? Then, if you are getting intermittent hot/cold (from the hot water supply pipe), a bad mixing valve would make sense.

  2022 T@B 400 BD
  2019 Ford F-150 3.5L Ecoboost with Long Bed

  0 · Share on FacebookShare on Twitter Share on Google+
• cooper31525 Member Posts: 14

  December 2017

  Hello and thanks for your thoughts.  I get intermittent hot and cold water in both sinks and the toilet. 

  0 · Share on FacebookShare on Twitter Share on Google+
• rustyshibley Member Posts: 4

  June 2018

  This forum is super helpful for us--especially the Winterizing Link with the diagram.  We are new owners of a 2016 TAB CS-S and heated water for the first time and discovered scalding hot water coming out when turn on either the hot or the cold faucets in either sink.  We are trying to determine if one of the valves is turned wrong or if we have a defective mixing valve.  Kind of hate towing it to an RV repair shop.  Most likely they won't have any better idea what the problem is than we do.  Please let us know if you did replace your mixing valve and if that fixed your issue.  Thanks!
  

  0 · Share on FacebookShare on Twitter Share on Google+
• RollingBnB Member Posts: 322

  June 2018 edited June 2018

  Do you have the outside shower? Make sure those valves are turned off or the hot and cold will mix in the shower control head.
  Never mind, just saw how old this is.
  

  2020 Tiffin Open Road

  2020 Nissan Versa Toad 
  Alan & Patty
  Southern Az

  0 · Share on FacebookShare on Twitter Share on Google+
• Sharon_is_SAM Member Posts: 10,064

  June 2018 edited June 2018

  @rustyshibley, check the Alde bypass valve.  I am looking at the camping season settings in the Tab manual, and that valve should be turned off.  If left open (parallel to the pipe), it appears that the hot water would mix with the cold water beyond the mixing valve.  Let us know what you find.  I will try to attach a plumbing diagram.

  Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
  

  1 · Share on FacebookShare on Twitter Share on Google+
• Sharon_is_SAM Member Posts: 10,064

  June 2018

  
  

  Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
  

  0 · Share on FacebookShare on Twitter Share on Google+
• Sharon_is_SAM Member Posts: 10,064

  June 2018

  Curious if hot water is coming from the toilet flush.

  Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
  

  0 · Share on FacebookShare on Twitter Share on Google+
• MuttonChops Member Posts: 1,890

  June 2018

  SAM said:

  Curious if hot water is coming from the toilet flush.

  Not having both winter by-pass valves in the correct position can cause this to happen.

  
  

  Did happen during my new T@B walk through.  The young 'delivery prep' guy had to track down the service manager and in a few minutes he had things cleared up.

  
  

  Cold would flow, then hot (until 2-gallons tank was empty), then cold.

  And it was real hot . . . would not have been enjoyable to be sitting on the toilet . . .
  

  '18 320 S,  pitched axle, 3020HE; PNW based
  

  TV: '17 Colorado V6 Z71 4x4, Tow Package, GM Brake Controller
  TV: '25 Canyon AT4
  Adventures:  57   Nights:  399  Towing Miles 49,190
  

  1 · Share on FacebookShare on Twitter Share on Google+
• Sharon_is_SAM Member Posts: 10,064

  June 2018

  @MuttonChops, which other valve?

  Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
  

  0 · Share on FacebookShare on Twitter Share on Google+
• MuttonChops Member Posts: 1,890

  June 2018

  MuttonChops said:

  Not having both winter by-pass valves  . . . .
  

  
  

  Sorry, my error. The one by-pass valve.  Service guy was also playing with the HW & CW disconnect valves to the Alde . . . . but think he was just trying  everything to get a customer out of the shop.
  

  '18 320 S,  pitched axle, 3020HE; PNW based
  

  TV: '17 Colorado V6 Z71 4x4, Tow Package, GM Brake Controller
  TV: '25 Canyon AT4
  Adventures:  57   Nights:  399  Towing Miles 49,190
  

  0 · Share on FacebookShare on Twitter Share on Google+
• welovenaples Member Posts: 4

  November 2018

  PLEASE HELP! I just bought a used 2016 T@B 320 and just about ready to send it to it's grave over hot water issues.  I too am experiencing hot water coming from the cold faucet(s) then after 30 seconds turning cold - no problem, I guess.  But the hot side never gets hot.  The forum has been great about the valve positions.  I am confident I have the valves correctly set to "camping" mode i.e., bypass closed, hot open, cold open, drains closed.  The mixing valve has me quite confused.  Pic attached for verification.  Twisting it the opposite of my pic will shut off hot side completely.

  0 · Share on FacebookShare on Twitter Share on Google+
• ScottG Administrator Posts: 5,640

  November 2018

  @welovenaples, I don't have the mixing valve so I can't help much. I do recall that others have had problems getting it adjusted properly, possibly even to the point of replacing it.

  If you haven't already done so, search around here and I think you will find several other threads that might offer some clues.
  

  2015 T@B Max S (320)
  2015 Nissan Frontier SV V6 4x4

  0 · Share on FacebookShare on Twitter Share on Google+
• falcon1970 Member Posts: 758

  November 2018

  @Sharon_is_SAM I apologize hijacking this thread, but do you also have plumbing schematics for the TAB400?  And while we are at it, schematics for the other systems--Alde cabin heating, electrical, and air conditioning?

  0 · Share on FacebookShare on Twitter Share on Google+
• Sharon_is_SAM Member Posts: 10,064

  November 2018

  @falcon1970
  
  This is the only one I can find.  We need some creative 400 owners to step up here😊
  
  https://tab-rv.vanillacommunity.com/discussion/7334/tab-400-wiring-and-plumbing-diagrams
  
  @ScottG, can you add this to the User Manual/PDF thread, please.  

  Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
  

  0 · Share on FacebookShare on Twitter Share on Google+
• Sharon_is_SAM Member Posts: 10,064

  November 2018

  @welovenaples, please check out this thread.  If you are confident you are turning the valve correctly and still have limited hot water, then order a new mixer valve as that is most likely the problem.  
  
  https://tab-rv.vanillacommunity.com/discussion/comment/36103#Comment_36103
  

  Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
  

  0 · Share on FacebookShare on Twitter Share on Google+
• welovenaples Member Posts: 4

  November 2018

  Can anyone refer a source for acquiring a new mixer valve?

  0 · Share on FacebookShare on Twitter Share on Google+
• jgram2 Member Posts: 1,522

  November 2018

  Call Elsie in parts at NüCamp 844.823.9112 x 304. NüCamp numbers and contacts are n the category column on the left hand column.

  John, Judi, Guinness & OD in PDX
  T@Bit@t 2015 S Max Outback, ‘18 V6 4Runner 
  
  
  

  0 · Share on FacebookShare on Twitter Share on Google+