🚿 Shower Keeps Going Hot and Cold? Here's What You Need to Know. Plumbing Services in Gravesend, Kent, Essex & South East London

GladPro Plumbing Services
Sep 29
4 min read

Few things are more frustrating than stepping into a relaxing shower—only to be hit with sudden bursts of cold or scalding hot water. If your shower temperature keeps fluctuating, it's more than just uncomfortable — it could point to underlying plumbing or hot water system issues that need attention.

In this guide, GladPro Plumbing Services, your trusted local plumber in Gravesend, Kent, Essex and South East London, explains the most common causes of inconsistent shower temperatures — and what you can do to fix them.

✅ Quick Summary

Electric and mixer showers can fluctuate due to worn components, blockages, or pressure imbalances.
Pipe corrosion, shower valve issues, and filter blockages are common plumbing-related causes.
Water temperature may change when other taps or appliances are used at the same time.
Inconsistent hot water may be caused by your boiler or hot water cylinder.
GladPro Plumbing Services can assist with diagnosing and fixing faults in vented and unvented cylinders to restore reliable hot water flow.
All work comes with a 12-month guarantee for your peace of mind.
We offer 15% off for senior citizens (60+), 10% off for returning customers, and free no-obligation quotes.

🔧 Common Plumbing Causes of Shower Temperature Fluctuations

Let’s look at the most common plumbing-related reasons your shower might be going hot and cold.

🔌 Electric Showers

Electric showers heat cold water on demand using an internal heating element.

Typical Issues:

Faulty Heating Element – May cut out intermittently or overheat.
Malfunctioning Thermostat – Can’t regulate temperature accurately.
Low Water Flow – Clogged filters or pipe restrictions may prevent proper function.

🚿 Mixer Showers

Mixer showers combine hot and cold water from your home’s supply. They're highly sensitive to changes in water flow or pressure.

Common Issues:

Worn or Clogged Cartridges – Aged thermostatic cartridges often fail to maintain a stable temperature.
Pressure Imbalance – Flushing a toilet or running a tap during a shower can change the mix of hot and cold water.
Blocked or Corroded Pipes – Especially in older homes, internal corrosion or scale can reduce flow and affect the water mix.

🔥 Could the Issue Be With Your Boiler?

If your shower is supplied by a combi or system boiler, inconsistent temperature might be related to the boiler itself.

Potential Boiler-Related Causes:

Inadequate Output – Combi boilers can struggle to supply hot water if demand is high.
Diverter Valve Issues – May fail to direct hot water to the shower properly.
Low Boiler Pressure – Affects flow and temperature.
Sensor or Thermistor Faults – These components regulate water temperature inside the boiler and may be faulty.

📌 If you suspect a boiler-related fault, contact a Gas Safe registered heating engineer to inspect and resolve the issue safely.

💧 Could It Be a Problem with Your Vented or Unvented Hot Water Cylinder?

If your home uses a vented or unvented hot water cylinder, issues in the cylinder system can also cause hot and cold fluctuations during showers.

Common Cylinder-Related Issues:

Faulty Thermostat or Immersion Heater – Can cause overheating or no hot water.
Airlocks in the System – Especially common in vented cylinders; can restrict flow.
Pressure Problems in Unvented Cylinders – If pressure drops or safety valves fail, hot water delivery may become inconsistent.
Stratification – Uneven heating inside the tank can lead to layers of hot and cold water being delivered unpredictably.

📌 GladPro Plumbing Services can help diagnose and resolve faults with both vented and unvented hot water cylinders, ensuring your shower runs at a consistent, comfortable temperature.

🛠️ Other Plumbing Fixes That Can Help

In many cases, plumbing-related fixes can restore consistent shower temperature without any need to touch your boiler.

✅ What We Can Check and Repair:

Replace Thermostatic Cartridges – Restores temperature balance in mixer showers.
Unblock Filters and Showerheads – Improves flow and prevents overheating or sudden cold bursts.
Inspect Pipework for Blockages or Corrosion – Especially important in older homes.
Install Pressure Regulators – Helps keep flow stable even when other taps are in use.

💡 How to Prevent Shower Temperature Fluctuations

Avoid running other taps or appliances while someone is showering.
Descale showerheads regularly, especially in hard water areas like Gravesend or Dartford.
Install a thermostatic mixer valve if your current valve is manual or basic.
Have your plumbing and hot water systems inspected annually to catch issues early.

🏠 Why Choose GladPro Plumbing Services?

At GladPro, we’re proud to offer:

✅ 12-Month Guarantee on all work completed

✅ 15% Discount for Senior Citizens (60+)

✅ 10% Discount for Returning Customers

✅ Free, No-Obligation Quotations

✅ Local, qualified, and experienced plumbers you can trust

We believe in transparent pricing, honest advice, and high-quality workmanship—whether it’s a small fix or a full plumbing inspection.

📍 Local Plumbing Services in Gravesend, Kent, Essex & South East London

Based in Gravesend, GladPro Plumbing Services is proud to serve homes and businesses throughout:

🛠️ Kent – Gravesend, Dartford, Rochester, Chatham, Strood and surrounding areas.
🛠️ Essex – Basildon, Tilbury, South Ockendon and surrounding areas.
🛠️ South East London – Bexleyheath, Plumstead, Thamesmead and surrounding areas.

We provide expert help with plumbing diagnostics, pipework issues, shower faults, and hot water cylinder problems.

📞 Experiencing Hot and Cold Shower Issues? Contact GladPro Plumbing Services

If your shower keeps running hot and cold, don’t ignore the problem — it could point to a fault in your plumbing, mixer valve, or hot water system.

GladPro Plumbing Services can help you identify and fix the issue, whether it’s a blocked pipe, faulty shower fitting, or a problem with your vented or unvented hot water cylinder.

Contact GladPro Plumbing Services Today:

📱 Phone: 07375 702735
📧 Email: gladproplumbingservices@outlook.com
🌐 Website: www.gladproplumbingservices.com

💡 Don't forget: 15% OFF for senior citizens (60+) - 10% OFF for return customers - All work guaranteed for 12 months - Free, no-obligation quotations!