Why Is My Electric Shower Too Hot? Top 3 Issues

neil hughes

Neil Huges

Last Updated: 20/04/2024

Have you ever stepped into your shower expecting a warm, soothing spray but instead got scorched by water that's just too hot? 

It's not just your imagination; you're not alone in this heated dilemma. 

Why does this happen, and what can you do about it?

In this article, we'll bridge the gap between your ideal comfortable shower and the scalding reality you're facing. 

We'll explore the common causes behind excessively hot showers and provide practical solutions to help you achieve the perfect temperature. 

Get ready to turn down the heat and turn up your shower enjoyment!

Key Takeaways

  • Direct Answer to Your Query: Your electric shower is too hot primarily due to a malfunctioning thermostat, scale build-up on heating elements, or pressure fluctuations in your water supply. Addressing these issues can help regulate the temperature.

  • Understanding the Mechanism: Electric showers heat water directly through heating elements and regulate temperature using a thermostat. Issues with either component can result in overly hot water.

  • Maintenance is Key: Regular descaling of the heating elements and checking the thermostat for functionality are critical in preventing overheating and ensuring a consistent water temperature.

  • When to Seek Help: If troubleshooting doesn’t resolve the overheating issue, it's advisable to consult a professional. This ensures that your electric shower is correctly diagnosed and safely repaired.

  • Find out the top rated electric showers in 2024 from Best Electric Showers.

Free PDF: Ultimate Buyer's Guide to Electric Showers

Understanding Your Electric Shower

Electric showers offer a unique advantage by providing hot water on demand without needing a hot water tank. 

But how exactly does this nifty appliance deliver heated water when you turn on the tap? 

Let’s examine the mechanics behind electric showers and clarify the role of their crucial components, the heating elements and thermostats.

The Basics of Electric Shower Operation

An electric shower draws cold water directly from the main supply and heats it as it passes through the unit. 

The heating elements responsible for warming the water to your desired temperature are at the heart of this process. 

These elements operate like a kettle, heating up quickly when electricity is applied.

The role of the thermostat is equally important. 

It monitors the temperature of the water and adjusts the heating elements' power accordingly. 

This ensures that the water remains at a consistent temperature, as set by your shower’s control dial, regardless of variations in water flow or incoming water temperature.

Understanding these basics helps demystify why temperature issues occur and sets the stage for troubleshooting common problems that might make your shower run too hot or too cold.

Why Is Your Shower Too Hot? Top Common Issues

While electric showers provide the convenience of instant hot water, several issues can lead them to produce water that's too hot, affecting your showering experience. 

Let’s explore the most common reasons for overheating in electric showers.

1. Is Your Thermostat to Blame?

A thermostat that is in good working order is crucial for regulating the water temperature. 

If the thermostat fails, it may not properly monitor and control the heat generated by the electric elements, leading to uncomfortably hot water. 

This malfunction could be due to electrical faults or wear and tear over time.

2. The Hard Truth About Scale Build-Up

Water hardness can significantly impact electric showers. 

Over time, minerals in the water, such as calcium and magnesium, can accumulate on the heating elements as scale. 

This scale buildup insulates the heating element, causing it to overheat, which overheats the water. Regular descaling is necessary to prevent this issue and maintain efficient operation.

3. When Water Pressure Plays Tricks on Temperature

Changes in water pressure can also affect your electric shower’s performance. 

If the water pressure drops too low, the flow through the heating element slows down, allowing the water to heat up more than intended. 

Conversely, very high pressure can lead to erratic temperature changes. 

Ensuring a consistent water pressure is key to maintaining the desired temperature.

Figuring Out Why Your Shower Burns

If your electric shower produces too hot water, it's important to diagnose the issue accurately to find the right solution. 

Below, we detail how to identify signs of malfunction and what tools you might need to troubleshoot effectively.

Spotting Signs of Trouble

Recognising the signs of a malfunctioning electric shower can help you address the issue before it escalates. 

Key indicators include:

  • Water temperature that is too hot, regardless of how you adjust the controls.

  • Sudden changes in water temperature during use.

  • The heating element turned on and off more frequently than usual.

These signs suggest that components within the shower, such as the thermostat or heating elements, may not be functioning correctly.

What You’ll Need to Fix It

To diagnose your electric shower's issues, you will need a few basic tools and safety equipment:

  • A multimeter to check the electrical components for continuity and proper function.

  • An adjustable wrench and a screwdriver to access the internal components.

  • Safety glasses and gloves to protect yourself while handling electrical parts.

With these tools, you can assess whether the thermostat is functioning correctly or if the heating elements are damaged or scaled.

Simple Fixes for a Too-Hot Shower

When you've identified that your electric shower is overheating, several practical steps can be taken to remedy the issue. 

Let’s break down the solutions to ensure you enjoy a consistent and comfortable shower temperature.

Dial Down the Heat

Adjusting the temperature settings of your electric shower can sometimes resolve overheating issues. 

Here’s how to do it:

  1. Locate the temperature control dial on your shower unit.

  2. Gradually adjust the dial towards a cooler setting while the shower is running.

  3. Allow a few minutes for the temperature change to take effect as the heating elements adjust.

It’s important to make these adjustments incrementally to avoid sudden temperature changes.

Thermostat Troubles? Here’s a Fix

If you suspect the thermostat is faulty, here’s how to diagnose and potentially replace it:

  1. Turn off the power to the shower at your circuit breaker.

  2. Remove the cover of the shower unit to access the thermostat.

  3. Use a multimeter to test the thermostat for continuity. If there is no continuity, the thermostat needs replacing.

  4. Replace the faulty thermostat with a new one, ensuring it's compatible with your model.

  5. Reassemble the unit, restore power, and test the shower for proper temperature control.

Clean Up Your Act to Cool Down Your Shower

Scale build-up on the heating elements can also cause overheating. To address this:

  1. Turn off the power to the electric shower and allow it to cool.

  2. Dismantle the shower unit to access the heating elements.

  3. Inspect the elements for any visible lime or scale build-up.

  4. Use a descaling solution or vinegar to clean the elements thoroughly if scale is present.

  5. Rinse the elements, reassemble the shower, and test to see if the temperature has normalised.

When It’s Time to Call the Shower Fixer

Sometimes, the issues with your electric shower are complex enough for professional intervention. 

Knowing when to call a qualified technician can save you time and ensure safety. Here’s how to determine when expert help is needed.

Troubles That Demand a Professional

While minor adjustments and simple repairs can often be handled on your own, certain conditions signal the need for a professional, including:

  • Persistent overheating despite troubleshooting and replacing accessible parts.

  • Electrical faults or wiring issues are hazardous to tackle without proper training.

  • Water leaks from the shower unit could indicate more severe internal problems.

These issues require specialised knowledge and adherence to safety standards and local regulations.

How to Pick the Right Help

Selecting the right professional is crucial for effective and safe repairs. Follow these tips:

  • Look for certified professionals with experience, specifically in electric showers.

  • Check reviews and seek recommendations from friends or online platforms to find a reliable technician.

  • Ensure they offer a warranty on their work, providing added security for the repairs undertaken.

By choosing a qualified technician, you can ensure that your shower is fixed correctly and safely, restoring your peace of mind and functionality.

Stop Your Shower from Overheating Again

Maintaining your electric shower prolongs its life and ensures it operates safely and efficiently. 

Here are some key preventative measures that can help you avoid future overheating issues.

Maintain to Sustain: Keeping Your Shower Cool

Regular maintenance is essential for keeping your electric shower in top condition. Consider the following tips:

  • Descale Regularly: Scale buildup can occur quickly in areas with hard water. Regular descaling of the heating elements can prevent this buildup and ensure efficient operation.

  • Check the Thermostat: Periodically test the thermostat to ensure it functions correctly, replacing it if necessary to maintain accurate temperature control.

  • Inspect for Leaks: Regularly check for any signs of water leaks or drips within the shower unit, as these can indicate deeper issues affecting temperature regulation.

These simple steps can significantly reduce the risk of overheating and other operational issues.

Thinking of an Upgrade? What You Need to Know

If your shower is older or continually experiences issues, consider upgrading to a newer model. 

Modern electric showers come with improved technology and features, such as:

  • Digital Temperature Controls: These allow for more precise temperature settings.

  • Eco-Friendly Models: Some newer models are designed to be more energy-efficient and include features that prevent overheating and scale buildup.

Upgrading can be a cost-effective way to ensure your shower remains reliable and efficient.

© Copyright 2024 Best Electric Shower LTD. All rights reserved. | Company Number: 15606794 | Registered in England and Wales with registered office in Linden Fields, Tunbridge Wells, England, TN2 5QX

Email Support: support@bestelectricshower.co.uk | Customer Support: 02081752283  

Privacy Policy | Cookie Policy | Terms of UseAffiliate Policy

© Copyright 2024 Best Electric Shower LTD All rights reserved | Company Number: 15606794 | Registered in England and Wales with registered office in Linden Fields, Tunbridge Wells, England, TN2 5QX

Email Support: support@bestelectricshower.co.uk | Customer Support: 02081752283  

Privacy Policy | Cookie Policy | Terms of UseAffiliate Policy

© Copyright 2024 Best Electric Shower LTD All rights reserved | Company Number: 15606794 | Registered in England and Wales with registered office in Linden Fields, Tunbridge Wells, England, TN2 5QX

Email Support: support@bestelectricshower.co.uk | Customer Support: 02081752283  

Privacy Policy | Cookie Policy | Terms of UseAffiliate Policy


Free Guide: Ultimate Buyer's Guide to Electric Showers