Shower Handle Spins Freely? Find the Broken Part
You turn the shower handle and it just spins. The water will not come on, or worse, it is running and will not shut off. It feels like something broke deep in the wall, but most of the time the problem is the grip between the handle and the valve, and that grip has only a few parts in it.
This guide checks them in order, cheapest and quickest first: the screw that holds the handle, the adapter or teeth the handle grips, and then the stem or cartridge itself. It covers single handle showers and the older two and three handle kind, and it ends with the signs that mean you should call a plumber.
If the handle spins and the shower will not shut off, stop the water before you take anything apart. On a Moen Posi-Temp shower, Moen says you can remove the handle and turn the cartridge stem with pliers, all the way clockwise to turn the water off, and warns not to turn your home water supply on if the cartridge retainer clip is missing or not securely in place. If the clip is missing, close the main water valve to the house instead of turning the stem, which is our own advice. Some Moen Posi-Temp valves have optional stops behind the trim that Moen says look like small flat head screws: turned so the slot is vertical, they are off. Delta says some of its valves have stops that close clockwise with a flat screwdriver. If your valve has no stops, close the main water valve to the house. Pliers on the stem are only a way to get the water off. They can chew up the ridges on the stem, which is our own caution and not a maker rule.
Which kind of shower do you have?
A single handle shower has one lever or knob that turns the water on and sets the temperature. Moen Posi-Temp, Delta Monitor and MultiChoice, and Kohler Rite-Temp valves all work this way. A two or three handle shower has a separate hot handle and cold handle, and a three handle shower has a middle handle that sends water to the tub spout or the showerhead. The checks below are split the same way.
Single handle showers: three checks
On a single handle shower the grip runs through three parts. The handle is held by a screw: a set screw on Moen and Delta, a center Phillips screw under a cap on Kohler MasterShower trim. The handle fits over a plastic or metal handle adapter. The adapter is held on the cartridge stem by its own screw. Moen's instructions for the Posi-Temp lever handle show exactly this stack, and Delta's and Kohler's show an adapter between the handle and the cartridge too.
Step 1: Check the handle screw
Look for the screw that holds the handle. On a Moen Posi-Temp lever the set screw is underneath the handle and Moen removes it with a 7/64 inch hex key. Delta secures its 13 and 14 Series handles with a set screw, and some models hide it under a plug button. On Kohler MasterShower trims, Kohler says to pry off the center cap and remove a Phillips screw. If the screw is loose or missing, the handle has nothing holding it, and tightening or replacing the screw may be the whole fix. Bring the old screw to the hardware store to match it.
Step 2: Check the handle adapter
With the handle off, look at the adapter on the end of the cartridge stem and the teeth inside the handle. Moen's instructions take the Posi-Temp handle adapter off by removing a Phillips screw in its center, and slide it back onto the stem of the cartridge. Delta's installation sheet for the 13 and 14 Series also installs an adapter on the cartridge stem with a screw. If the adapter's teeth are worn smooth or cracked, replace the adapter. Moen sells it as the Posi-Temp handle adapter kit, 116653. One distributor lists a plastic handle adapter, two replacement screws and an Allen wrench in the kit, and another describes it as a fix for a handle that feels loose or slips. FourHome does not sell handle adapters, so buy the one made for your valve brand.
Step 3: Check the cartridge stem
Pull the adapter and look at the end of the stem. The ridges should be crisp. If they are rounded off, or the stem is cracked or broken, the cartridge is the part to replace, because on these valves the stem is part of the cartridge. Moen notes that a hard to turn Posi-Temp handle can stress the brass stem of the 1222 cartridge and occasionally cause it to break off, and Moen shows how to remove a broken cartridge. If the stem looks fine, the water is on at the stops or the main, and turning the bare stem carefully with pliers does nothing, the cartridge has most likely failed inside and needs replacing too. That test is our own, not a maker step. Turn the water back off before you take the cartridge out.
Before you put the handle back on a Moen Posi-Temp, Moen says to turn the handle to the off position and then reinstall the 7/64 inch hex screw.
Two and three handle showers: the handle or the stem
On an older two or three handle shower each handle sits on the end of a stem and is held by a screw in the center of the handle, often under a small cap or index button. This Old House and Danco both start a stem repair the same way: take out that screw, pull the handle off, then remove the stem from the valve with a wrench (Danco) or a valve socket and pliers (This Old House). The handle grips the stem through a splined end called the broach. Danco describes splines as the pointed ridges around the top of a stem, and says each broach is set by how many splines it has.
Step 1: Tighten the handle screw
This step is our own advice. A loose center screw lets the handle ride up off the splines and slip. Tighten it and try the handle. If the screw will not tighten, it or the threads in the end of the stem may be stripped.
Step 2: Look at the teeth inside the handle
Pull the handle and look inside it. If the teeth there are worn smooth while the stem's ridges are still sharp, the handle is the worn part, and a new handle with the same broach fixes it. Count the splines on the stem, as Danco describes, or take the old handle with you, so the new one matches.
Step 3: Look at the end of the stem
If the ridges on the stem are rounded off, a new handle will slip on it too. Replace the stem. Hunker notes that if the ribs on the stem are worn, the ones on the handle are probably worn too, and suggests replacing the handle. Shut off the water first, then follow the stem removal steps for your valve. If you have a Sayco 308 or T-308, our Sayco 308 stem guide walks through it. Take the old stem to compare length, broach and threads before you order a replacement.
What you found, and the fix
| What you find | The fix | The part |
|---|---|---|
| Handle screw loose or missing | Tighten or replace the screw | A matching screw from the hardware store |
| Teeth worn inside the handle adapter (single handle) | Replace the adapter | The adapter kit for your valve brand, for Moen Posi-Temp the 116653 kit |
| Teeth worn inside the handle, stem still sharp (two or three handle) | Replace the handle | A handle with the same broach as the stem |
| Ridges on the stem rounded off, or the stem broken | Replace the cartridge (single handle) or the stem (two or three handle) | The cartridge or stem that matches the part number or the old part |
| Stem turns but the water does not change | Replace the cartridge or stem | Same as above |
When to stop and call a plumber
- The water will not shut off and you cannot find stops or the main valve.
- The stem has broken off inside the valve and you are not comfortable removing the rest of the cartridge. Moen shows a method with a tap for a broken 1222 cartridge, but it takes care not to damage the valve body.
- The cartridge or stem will not come out with the tools your maker recommends. Forcing it can damage the valve in the wall.
- Your shower is thermostatic or digital. The checks here are for ordinary single handle pressure balance valves and two or three handle compression valves.
Frequently asked questions
Why does my shower handle spin without turning the water on or off?
The handle has lost its grip on the valve. On a single handle shower the grip runs from the handle, through its screw, to a handle adapter on the cartridge stem. On a two or three handle shower the handle sits on the splined end of the stem and is held by a screw. A loose screw, worn teeth in the adapter or the handle, or a worn or broken stem will all let the handle turn without moving anything.
How do I shut the water off if the handle just spins?
Moen says that on a Posi-Temp shower you can take the handle off and turn the cartridge stem with pliers, all the way clockwise for off, as long as the cartridge retainer clip is in place. Some Moen Posi-Temp valves and some Delta valves have stops behind the trim that close with a flat screwdriver. If yours has neither, close the main water valve to the house.
Can I fix it with a new handle?
Only if the handle is the worn part. If the teeth inside the handle or the handle adapter are stripped, a new handle or adapter fixes it. If the ridges on the stem itself are rounded off, a new handle will slip on it too, and the stem or cartridge is the part to replace.
Do I need a new cartridge?
Not always. On a single handle shower, check the handle set screw and the handle adapter first, because those are cheaper and quicker. Replace the cartridge when its stem is worn smooth, is broken, or turning the stem itself does nothing.
What is a broach on a faucet stem?
Danco describes the broach as the pattern of splines, the pointed ridges around the top of a stem, and says each broach is set by how many splines it has. A handle has to match the broach of the stem it sits on, so count the splines before you buy a handle, or take the old stem with you.
Sources
The steps above come from these pages, except where a step says the advice is our own. We opened each one on October 12, 2026.
- Moen, Shower Handle: PosiTemp Valve, Lever Type 2, How to Operate a Posi-Temp without a Handle, How to Operate PosiTemp Stop Check Valves, No Water from Tub/Shower Units and How to Remove a Broken 1222 PosiTemp Cartridge.
- Moen 116653 Posi-Temp handle adapter kit at Ferguson, PlumbersStock and SupplyHouse.
- Delta, maintenance and installation sheet 107528 Rev I (13 and 14 Series).
- Kohler, Remove the Handles for the MasterShower Valve Trim.
- Danco, broach and spline guide on its stem pages and three handle stem repair.
- This Old House, How to Repair a Shower Valve Stem.
- Hunker, How to Fix Shower Valve Stems That Are Stripped.
Replacement cartridges and stems for Moen, Delta, Kohler, Pfister, Gerber, Sayco and more, shipped from Amazon fulfillment centers with Prime delivery.
See the full FourHome assortment on AmazonFourHome is an independent brand and is not affiliated with Moen Incorporated, Delta Faucet Company, Kohler Co., Pfister, Gerber Plumbing Fixtures, Sayco, Danco, This Old House or Hunker. Brand names and part numbers are used only to identify parts or to cite their published instructions. Shut off the water before you work on a valve, do not force a stuck part, and call a licensed plumber when a repair goes beyond a handle, a stem or a cartridge.
FourHome is not affiliated with or endorsed by any faucet manufacturer. Brand names and part numbers are used only to identify compatibility.