Triton Shower Thermal Cut Out Reset Guide

By Ben Victor

Updated: 20th August 2023

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When it comes to electric showers, Triton is a name that many homeowners trust.

However, like all electrical appliances, even the best can sometimes face issues.

One common problem with Triton showers is the triggering of the Thermal Cut Out (TCO) feature.

This safety feature is designed to prevent the unit from overheating, but when it’s triggered, it can leave you with a cold shower.

Fortunately, resetting the TCO is often straightforward.

In this guide, we’ll walk you through the process step by step. Let’s go!

Triton Shower Thermal Cut Out Reset — Credit: @cagmito76

What is the Thermal Cut Out (TCO)?

Before diving into the reset process, it’s essential to understand what the TCO is.

The Thermal Cut Out is a safety mechanism in Triton showers (and many other electric showers) that shuts off the heating element if it detects temperatures that are too high.

This can be caused by:

A blocked showerhead or hose, restricting water flow.
A malfunctioning heating element.
A failure in the internal thermostat.

Signs Your TCO Has Tripped

Sudden Loss of Hot Water: If your shower suddenly goes cold and doesn’t heat up again, it’s a sign that the TCO might have tripped.
No Heat After Powering On: If you turn on your shower and only get cold water, even after waiting for a while, the TCO might be the culprit.

How to Reset the TCO on Your Triton Shower

Safety First: Before attempting any fixes, always turn off the electricity supply to the shower at the circuit breaker, shower switch or/and fuse box.

Also, it is always advised that you only attempt any electric work if you are a qualified electrician.

If in doubt, hire a professional!

Access the Unit:
- Remove the cover of your Triton shower. This usually involves unscrewing a few screws located around the perimeter of the unit.
- Once the screws are removed, gently pull the cover away, exposing the internal components.
Locate the TCO:
- The TCO is typically a small, round component with two wires connected to it. It’s usually located near the heating element or the thermostat.
- Some models might have a reset button on the TCO. If yours does, press it. If the button stays down, the TCO has been reset. If it pops back up, there might be a persistent issue causing overheating.
Check for Blockages:
- Ensure that the showerhead and hose are free from any blockages. Limescale or debris can restrict water flow, causing the unit to overheat.
- Clean the showerhead by soaking it in a descaling solution or white vinegar for a few hours. Rinse thoroughly before reattaching.
Reassemble the Unit:
- Once you’ve reset the TCO and checked for blockages, reattach the cover. Ensure all screws are tightened securely.
- Restore power at the circuit breaker or fuse box.
Test the Shower:
- Turn on the shower and check for hot water. If the water heats up as expected, the issue has been resolved.
- If the problem persists, there might be a more severe issue, such as a faulty heating element or thermostat. In such cases, it’s best to consult with a professional electrician or plumber.