TAB 400 Boondock 2022: Luke Warm to Cold Water Showers with Shore Power and Propane. Mixing Valve?

riverchemistry

Hi all! I have a problem, for about a year I could never get the mixing valve to give any sort of hot water out of the shower in my TAB400 Boondock. I've watched these videos I'll link here

• https://youtu.be/-3OJxJdR34o
• https://youtu.be/nJR-DlZuYlE

The videos help. But, I can't quite get the results that I'm looking for. It's always, at most Luke warm to cold. When I have the shower knob fully to the left. On While on shore power I fire up the Alde, prioritize propane, press the propane button on the touch screen until the little fire symbol is green and wait for the Alde to make a beeping sound indicating the hot water is ready. When it beeps I turn on the shower head and feel the water temp. It's cold.

Last trip I lifted up the bedroom space and accessed the Alde under it, the water tank felt hot, all the lines leaving the Alde tank felt extremely hot to the touch. Finally all the 'red' lines running into the mixer were extremely hot. They are hot. and the Blue lines are cold, coming in from the water source at the RV Site.

But, when touching the final line that leaves below the Alde Mixer, that line is cold.

There appears to be hardly any water pressure from the shower when the temperature knob is fully to the left. It pretty much just dribbles warm water.

When I move the dial closer to 'C' for cold the pressure rises and water starts getting colder and colder as I turn the shower knob right.

I've adjusted the Alde mixer and I'll attach photos here of where it is today. But, this mixer doesn't seem to give any changes even when turning it into what should be hotter water. Take a look at my photos. Can this mixer turn more? Have I missed something. I would turn it even more. However, I'm afraid the nut might pop off and water will come flying out of the top. Not sure how far it will allow me to go.

I'm getting excited about RV Travel this year and yall would help me so much if I could figure this puzzle out.

Any help would be appreciated.

Thanks all!

pthomas745

That is the "thermostatic mixing valve".  This thread has the rundown on how to adjust it.

https://tab-rv.vanillacommunity.com/discussion/12718/new-thermostatic-mixing-valve

A couple of things that always need to be asked when discussing the hot water issues:

What is the status of your Alde Bypass valve? So...check your setup for the proper settings of all the valves.  The mixer is only one part of the "things that can go wrong".  Check all the valves involved with winterizing.

Another owner this morning in one of the FB page groups discovered that the outdoor shower valve handles were left in the "open" position....and somehow all the hot water was being routed to the shower hoses, and not to the inside of the trailer.  So.....have a close look at whether the outdoor shower faucet handles are open.

Here are other threads with various issues concerning the mixing valve that may also help.

https://www.google.com/search?q=thermostatic+mixing+valve+site:tab-rv.vanillacommunity.com&client=firefox-b-1-d&sxsrf=APwXEddxmi-GX-JvSBQCFmUOUCOHjR2DIQ:1680584431872&ei=764rZLX2NIfakPIPr46akAs&ved=0ahUKEwj1qc7wuI_-AhUHLUQIHS-HBrIQ4dUDCA8&uact=5&oq=thermostatic+mixing+valve+site:tab-rv.vanillacommunity.com&gs_lcp=Cgxnd3Mtd2l6LXNlcnAQA0oECEEYAVCHCVjbO2CUQmgBcAB4AIABVYgB4Q-SAQI0MZgBAKABAcABAQ&sclient=gws-wiz-serp#ip=1

Sharon_is_SAM

@riverchemistry - pthomas has given you good info.  I assume you have followed the direction of the video and you have confirmed the glycol and water temperatures.  I will send nuCamp your photo and ask for the limit of the number of exposed threads on the mixer valve.  In the meantime, there are known failures of mixing valves that require replacement.  Also, the water pressure when hot water is used is a common complaint.  One question:  I am not familiar with an audible “beep” from the Alde when the hot water is ready.  I wonder if that is new.

Sharon_is_SAM

@riverchemistry - per Creed at nuCamp, the thermostatic mixing valve should be turned until it can no longer be turned.  It has a set limit and is designed to not pop off.  So, if you have maxed out and all other settings are appropriate, and you have never gotten hot water,  it seems you need a new mixing valve.