What Should I Do When My Walk-In Tub TCV Fails After the Warranty?

If the thermostatic control valve (TCV) on your Ella walk-in tub fails after its one-year limited warranty has ended, a complete replacement valve assembly is available as a paid part through your Ella dealer or the team at (800) 480-6850, and a licensed plumber fits it. Before ordering, have the cartridge cleaned, because mineral buildup on the cartridge and intake screens is the usual reason a TCV sticks or stops mixing, and a careful cleaning often restores full function. Warranty Exceptions: The TCV One-Year Warranty, Non-Ella Faucets, and Water-Quality Damage explains why the valve carries a shorter term than the rest of the tub; this page covers what your options are once that term is over.

Why the TCV Is Treated Differently from the Rest of the Tub

The Lifetime Limited Warranty covers the shell, frame, door, door seal and finish for life, and it also covers supporting equipment such as motors, pumps, fixtures, electronic controls, faucet, waste and overflow for life. The published warranty then states it directly: "Lifetime limited parts warranty does not apply to thermostatic control valve (TCV)." The TCV instead carries a one-year limited warranty, and that warranty does not cover cartridge malfunction caused by calcium, iron or other heavy particles in the water. In plain terms, a defect in the valve is covered for the first year, fouling from water quality is not covered at any point, and after the first year a replacement is a purchase rather than a claim. The full coverage is summarized in What Is the Lifetime Limited Warranty on an Ella Walk-In Tub?.

Ella does not send technicians. Removal, cleaning and replacement of the valve on site are done by a licensed and insured contractor or plumber, with free lifetime technical support available by phone or ticket if a question comes up mid-job.

First, Confirm the Valve Has Actually Failed

Several TCV complaints turn out to be a setting or a missing piece rather than a dead valve, so check these before spending anything.

• Confirm your tub has a TCV. It comes with the thermostatic faucet package, not with a particular tub model, and it shows up as a separate temperature handle on the deck beside the faucet. The dual-lever 5-piece fast-fill faucet and the 2-piece fast-fill faucet are not thermostatic. What Is a Thermostatic Control Valve (TCV) on a Walk-In Tub? shows what to look for.
• Check for the button on the control handle. It is the anti-scald mechanism, and without it you lose about half of the temperature range. Adjusting the governor will not make up the difference, so mention a missing button when you contact the team.
• If the water is simply not hot enough, the valve may be sitting at its factory setting of 100.4 degrees Fahrenheit. The temperature adjustment video on this page shows the spring-loaded locking pin inside the handle, why the button must be pushed to raise the temperature, and how the handle is lifted off the brass fitting and reset a quarter turn counterclockwise to let more hot water through.
• If the handle is stuck or hard to turn, only cold water comes through, or water at the spout measures well above the setting on a bath thermometer, the cartridge is fouled. Why Is the Water in My Walk-In Tub Too Hot? covers the overshoot case.

Option One: Clean the Cartridge and Intake Screens

The replacement video on this page shows the whole cleaning job on an existing valve, and it is the first thing to try on an out-of-warranty TCV because it needs no new part. In outline:

1. Shut off the water supply to the tub.
2. Loosen the Allen bolt and lift off the control handle, then remove the cover plate, slide off the TCV governor, remove the washers and take off the escutcheon plate.
3. Loosen the metal collar with channel locks or vice grips on the unthreaded flat wrench area only, so the threads are not damaged, and unscrew it completely.
4. Unscrew the cartridge and clean the intake screens with a soft brush and CLR. Sediment, salt and other debris collect on these screens. Check that the bottom of the cartridge is also free of debris.
5. Lightly lubricate the gaskets with lithium grease, replace and re-tighten the cartridge, then refit the collar, escutcheon plate, washers, governor and handle. Tighten securely without over-torquing.
6. While the valve is apart, inspect the water intake screen and the check valve on the bottom, since calcification there can impede water flow.

If you would rather not have the cartridge cleaned on site, Ella offers a cartridge cleaning service at its facility for a nominal fee covering labor plus shipping. Ask about it on your ticket. The step-by-step version of the job is in Temperature Control Valve (TCV) Stuck or Not Mixing: Cleaning the Cartridge and Replacing the Valve.

Option Two: Replace the Valve Assembly

When cleaning does not bring the valve back, the fix is a complete replacement valve assembly. Within the first year it is replaced under the warranty once the team verifies the failure from your photos and serial number. After the first year, contact your Ella dealer or the team at (800) 480-6850 and the replacement is supplied as a paid part. Send a photo of the faucet and valve, the measured water temperature, the setting you selected, your serial number and your order details, so the team can confirm your faucet configuration and send the right assembly. Your plumber then swaps the valve on the deck following the same removal sequence shown in the video.

Keeping the New Valve Out of Trouble

Because cartridge fouling is excluded from coverage, prevention is the only protection. The warranty requires the TCV to be protected with a filter or mesh in the water lines, and that filter or mesh must be cleaned periodically. Keeping it in place and clean is what protects the cartridge, and it is one of the things that keeps the tub's warranty in good standing alongside correct leveling and the published cleaning routine. If your water is heavy in calcium or iron, plan on checking the filter more often rather than waiting for the handle to stiffen.

Related Guides

• Replacing an Older TCV: 1/2 Inch vs 3/4 Inch Supply Inputs, the Hidden Deck-Plate Screw, the Governor Button and What Is Supplied
• Faucet Cartridge Burst and Spraying Water: Shutting It Down and Getting Replacement Hot and Cold Valves
• Leaking Diverter or Thermostatic Control Valve: Identifying Your Faucet and Ordering the Right Replacement

Common Questions