How to set the thermostat on a shower mixer tap? A few points worth knowing about this device

Each of us values the comfort of a warm shower after a long day at work. But what should you do when the water suddenly becomes too hot or too cold? The problem may lie with the thermostat in your shower mixer. In this article, we explain what a thermostat is, how it works, and how to repair or replace it when it stops working properly. Read on!

What is a shower mixer thermostat?

The thermostat in a shower mixer is an extremely practical, technologically advanced device that ensures a constant and safe water temperature while you shower. Its main task is to control the temperature of the outgoing water, regardless of pressure changes in the plumbing. Thanks to this, even if someone in another room turns on a tap or flushes the toilet, the water temperature in the shower will remain unchanged.

Thermostatic shower mixers are equipped with special mechanisms that automatically blend hot and cold water in the right proportions. Modern models may also offer additional features, e.g. safety stops that prevent accidentally setting a temperature that’s too high. They’re especially worth considering in homes with young children.

With a thermostat in place, using the shower brings not only comfort but also savings in water and energy. A steady temperature eliminates the need to adjust the flow during every shower, which translates into lower water consumption and less energy used to heat it. Thermostatic shower sets are available in various shapes and styles, allowing them to be easily matched to your bathroom décor, making it not only more functional but also more attractive. Be sure to check what we offer in our online shop!

How does the thermostat in a shower mixer work?

The thermostat in a shower mixer works on the principle of a mechanism that blends water from two sources — cold and hot — to achieve a set temperature. When you set the desired temperature on the thermostat knob, the internal mechanism adjusts the flow of both water streams to reach and maintain that temperature. What’s more, modern thermostats are equipped with special valves that automatically react to changes in water pressure or temperature, further enhancing comfort and safety.

A faulty thermostat in a shower mixer: how to deal with it?

Sometimes the thermostat may stop working properly. Sudden changes in water temperature or the inability to regulate it should raise concern. In such a situation, there are two main options: repair or replacement.

How to repair a thermostat in a shower mixer?

Repairing the thermostat can be relatively straightforward if you know the basics of plumbing. Follow these steps:

1. Turn off the water: before you start, make sure you’ve shut off the water supply to the shower to avoid flooding the bathroom.
2. Remove the knob: carefully take off the temperature control knob. It’s usually secured with a screw that needs to be undone.
3. Check the condition of the seals: inside the mixer there are seals that may be worn or damaged, causing the thermostat to malfunction. If you notice they’re in poor condition, replace them with new ones.
4. Clean the mechanism: remove any limescale deposits or debris that may be blocking the thermostat mechanism.
5. Check the thermostatic cartridge: if the seals and mechanism are in good condition, the problem may lie in the thermostatic cartridge itself. Check that it operates correctly — it should expand and contract with temperature. If it’s damaged, it may need to be replaced.
6. Reassemble everything: if everything is in order, reassemble the mixer and check whether the problem has been resolved.

How to replace the thermostat in a shower mixer?

If the above method didn’t bring the expected result, the thermostat may need to be replaced. Here’s how to do it:

1. Buy a new thermostat: make sure the new thermostat is compatible with your shower mixer.
2. Turn off the water: as before, shut off the water supply.
3. Remove the old thermostat: take off the knob, undo the fixings and remove the old thermostat.
4. Install the new thermostat: fit the new thermostat, following the manufacturer’s instructions.
5. Test it: once everything is reassembled, turn the water on and check that the new thermostat works correctly.

Thermostat: comfort in every home

Setting the thermostat in your shower mixer is the key to comfortable and safe showering. It’s an advanced device that keeps the water temperature constant, regardless of pressure changes in the system. Thanks to it, you’ll avoid unpleasant surprises while bathing. Keep it in good working order and your evening wash will be pure pleasure — quite literally and figuratively!