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The valve is around 15 years old, and had a new cartridge fitted about a year ago to cure a leak. After that it once again worked fine. Recently it has again become faulty and this time will only give a tepid shower. The hot and cold feeds have been valved off and each tested for flow, which is fine. The hot flow alone gives a strong shower, but much too hot. The cold, the same, but much too cold. When both feeds are fully on, I cannot get a mix which is more than cool to tepid. Adjusting the temp gauge does not work. What is the problem and what to do about it?
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Posted on Jan 02, 2017
The Moen Posi-Temp Valve is a pressure balanced valve and when not used for long periods of time they can stick causing only cold or hot water to pass through the valve.
A New Posi-temp cartridges can be purchased at most plumbing supply houses or big box outlets such as Lowes or Home Depot.
As long as you had cold water before, a new cartridge will solve the problem. In the future it would be wise to occassionally operate the valve at least a couple of times a month in order to keep the pressure assembly from becoming lodged in position. Just follow the instructions included with the new cartridge on the proper removal of the old cartridge and the installation of the new cartridge. a little silicone grease inside of the valve before installing the new cartridge will also help.
Be sure that there is no particles of the old cartridge left in the valve.
Posted on Dec 27, 2008
Is this a dual handle or single handle? if it is a single handle
turn the valve 180 degree. if not, then check the cold water supply line.
Posted on Jan 07, 2009
Uue a 1/8" allen wrench to remove handle to access the dial that set's the mixture of water.Remember or mark where it is and remove and reinsert counter clockwise about a 1/4 turn to start to you reach desired temperature setting. Be careful not to set it at a hot enough setting to burn you.
Once dial in place slide handle on and turn on to check water temperature.
Posted on Aug 01, 2010
SOURCE: We have a home that
Remove handle to gain acess to the temperature limit stop. Remove handle and pull out handle adapter kit and next there is a dail that can be adjusted to control the water to balance the temp. It could have been installed wrong, pay attention to where it is now and pull it back to it disengages out of the stem and move it counter clockwise a little and reinstall. Put handle on and test water for correct movement.
Go to link below for a part's diagram if needed.
TO ORDER PARTS CALL: 1-800-465-6130
Posted on Aug 15, 2010
I'm not now nor have I ever been a fan of the plastic moen replacement cartrideges. I don't know if they still do but probably about twenty five years ago I tried using a few of the plastic replacements,mostly due to high cost of the brass moen factory ones I think every one leaked. Then I actually read on the instructions that it was not unusual for them to leak some. My suggestion is to get a good brass moen magnum cartridge and be done with it for another twenty years. Hope this helps you. Thanks.
Posted on Nov 17, 2010
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