Question about Moen & One Handle Tub & Shower Faucet

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We have two showers one works perfect the other only cold water comes out when turned towards hot nothing happens..what is this

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Sounds like the anti-scald pressure balancing piece is stuck. This happens if the shower isn't used regularly. A varnish from minerals in the water causes it to stick. You can replace the cartridge or try cleaning this one by soaking it in white vinegar. When the cartridge is clean you should hear it rattle when you shake it. To prevent it from happening again be sure to run the hot and cold water at least once a week. BTW, if you are the original owner of the faucet Moen will send you a new cartridge free.

Posted on Jun 03, 2010

Testimonial: "Information very imformative and the added extra about moen was very nice as that is what I have and I am the original owner of the home."

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Posted on Jan 02, 2017

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My shower only stays hot for a minute and then goes cold even though the hot water works everywhere else. I have a hot and cold tap and a third one to direct to shower or tub.


I would take a look at the stem replacement task. Maybe something is clogging the hot water flow, perhaps a damaged washer or debris

Jan 14, 2013 | Moen Home

1 Answer

Shower goes cold intermittently like there is a restriction in hot water delivery. Plenty of hot water when it comes back, but the cold blast is not fun. No shortage of hot water for long showers or...


Has nothing to do with the expansion tank, the expansion tank whole enough air so that when the heater heats the water it does not build up pressure. You know from school that you can compress ait. you CAN NOT compress water. When you haet water it expands until it turns to steam. So lets rule that out.

First look at all the plumbing in the house where there is a cross conection. This would be like a shower valve that has a personal shower head on it. and you turn of the water using the personal shower handle and not the valve at the wall. This then would let cold water to go into the hot water side piping.

Most people do that with out knowing it at the laundry sink. they put a hose on to was the dog and forget to turn off the faucet and then BANG cold water in the hot side.

Go around the house and turn off all the faucets and valves by using the handles. no add on things.

Now last could be the shower valve itself. . Do this happen in just one shower or all of them???

If its just the one and you spend the day doing the walk around, even check the bidet if you have one

its the valve. you need repair to that.

Best of luck in your hunt Tom

Sep 08, 2011 | Amtrol ST-5-C THERM-X-TROL ASME Expansion...

1 Answer

Getting hot water when shower valve is first opened.


If I understand correctly, you have single handled shower faucet.
Normally there is a wait for hot water to arrive at faucet.
But now hot water is already at shower faucet.

Single handled faucets have a mixing area inside valve where hot and cold come together before going into sink.
This mixing valve can have crossover where the hot and cold can pass through to each other even when faucet handle is off. When single handle faucets get old, this can happen.
How it happens:
For example another faucet is turned on inside house, and pressure differential between hot and cold causes hot water at shower handle to pass through mixing area and into cold water line.
So if another faucet has been run, then that lets hot flow to faulty single handled shower faucet.
To confirm this is the problem: turn on other faucet and put ear against shower faucet to listen for moving water.
This condition may also signal there is a water leak.
The problem is not harmful, but will draw cold water into water heater each time, and is energy wasteful.
Replace faucet or have plumber repair problem.

Feb 19, 2011 | Price Pfister Single Lever Handle Faucet...

1 Answer

We have a neptune bar mixer shower that has been fitted to the wall and plumbed. All the water has been turned back on, the hot water is working fine but nothing is coming through the cold water side. cold...


Possibly switch off hot and cold water then undo cold water flange closest to the outlet and see if water comes out.if it does, tap assembly is faulty. If not, go back to where next available connection to the pipe was made. Work back untill you find the problem.

Aug 05, 2010 | Home

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When turning on the shower faucet there is no hot water.


adjust ur anti scold the setting is set to low when single handle shower units are shipped they are set in cold mode for safety ur install/instructional paperwork explains such and also advises on how to adjust---remove handle and on shaft will see a blue and red plastic clips that are adjustable slide towards u and move red for more hot water test water continue till comfort level is reached for hot water

Mar 24, 2010 | Kohler K-T12007-4s-BV Brushed Bronze...

1 Answer

Shower faucet does not switch to hot.


Hi,

This has happened to me in the past and had exactly the same symptoms but with a different valve. Before trying the below, it may make sense to be 100% sure that hot water is definitely getting to the valve .. can you get access to touch the hot feed pipe to make sure that it is in fact the valve at fault.

The following could be the issue:

1. The shower valve has a bit of dirt or gunk in it and is unable to allow the hot water through. It can happen with a very small amnount of dirt and is a real pain as it requires disassemble of the entire valve assembly.

2. The valve has failed and needs to be replaced - This was the solution to mine and was also significant in terms of effort.

Hope this helps, if so please leave feedback, if not let me know and I'll try and help some more!

Feb 02, 2010 | Delta T13420 Chrome Classic Single Handle...

3 Answers

Water is either hot or cold - no in between.


I found a way to get warm water in the shower, but I'm not sure it qualifies as a solution. After trying everything else I thought that maybe when I was feathering the faucet in the shower toward the cold side so I would get warm water that at a certain point it blocked the flow on the hot water side enough so that the sensor in the hot water heater sensed there was no demand in the line and it shut the water heater off. To test this, I went to the kitchen and turned the kitchen sink faucet all the way to the hot side and then turned it on so that I got a small flow of water. I waited for the water to get hot to be sure the hot water heater was working. Once it was hot, I left it running to keep demand in the line and then I went to the shower and turned the faucet on. When the water got hot I started feathering the control towards the cold side and soon I had warm water. So I think I'm right in that the sensor in the hot water heater was shutting the water heater off when the demand in the shower was lowered to a certain point when I was trying to adjust the water temp in the shower.

So now I can get warm water, but it means I have to leave the hot water running at another fixture in the house to create a false demand in the system so the hot water heater doesn't shut down. Is there a way to adjust the senor in the hot water heater so that it will stay on when I'm using the shower only, so I don't have to waste water by running another faucet when I want to take a shower?

Nov 28, 2008 | Water Heaters

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