Question about Moen & Posi-Temp Single Handle Shower Or Tub Valve

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MY Moen single handle shower knob turns in a complete circle. From left clockwise, it goes from hot, tepid, cold, tepid, then back to left-hot. What causes this and how can it be repaired?

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It sound like you have a Moen Posi-temp faucet and the handle is broken. It is probably an acrylic hdle with a tear drop shaped cover. Take a knife and slide it under the cover to pry it off. Unscrew the center screw and the handle will pull right off. You will see two shoulders inside the hdle, one of which will be cracked and broken. Replace the hndle which can be purchased at any Lowes or Home Depot. Plumbing supplies also carry replacements, but you can probably get one cheaper at HD or Lowes.. Make sure to use the washer provided. It has two flats on the inside of washer. Slide this over the brass stem on your cartridge, NOT on the hdle screw. Install it with the flats of the cartridge in horiz. position. Try faucet. If the water comes out in the opposite temp you expect, warm is cold, and cold is warm, remove the hdle, spin the stem 180 degrees and reinstall hdle.Good luck!

Posted on Oct 25, 2013

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Posted on Jan 02, 2017

  • 14 Answers

SOURCE: moen single handle valve tub/shower

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.
sanray

Posted on Dec 27, 2008

jeff_drakesr
  • 155 Answers

SOURCE: no cold water from Moen 2253 tub/shower valve,

Here is a quick check to see if the cartridge may be at fault allowing the cold and hot to mix. Turn off the hot water supply, with hot water supply off turn faucet on. Turn to the hot and cold sides, If you have only cold water then your faucet cartridge is at fault or the cartridge housing is worn. Shut all supply valves and remove cartridge and inspect housing for signs of wear. If wear is visible a new shower valve is needes. If none visible replace cartridge. I have included a link of a PDF file an exploded parts list. I hope this helps in solving your problem. Please rate if the answer helps in any way. Good Luck and have a great week. Jeff

Posted on Apr 05, 2010

  • 4336 Answers

SOURCE: leaking shower/tub faucet, looking for replacement

Call Moen directly. They will ship what you need to your door, for free.

Posted on Sep 18, 2010

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Hello
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