19 March 2020
How to fix cold spots in your radiator

How to fix cold spots in your radiator

Dirty water and sludge within radiators can cause cold spots in your radiators. At worst, they can prevent hot water from passing through your radiator altogether, leaving it completely cold. Not ideal for our cold Scottish weather!

“I have cold spots at the top of my radiators”

If the top of your radiator is cold, there may be air trapped within the system. This air can be released by bleeding the radiator.

How to check and bleed your radiators

Test your radiators by turning your heating on and checking all radiators are heating up correctly. The radiator should be very hot to touch, from top to bottom.

If any radiators are too cold overall or cold in places, bleed them if you can and check for visible signs of problems like cracks or small leaks.

Here is a guide from Worcester Bosch on how to bleed a radiator.

Get help bleeding your radiator

It’s okay to call in the experts for this kind of job. If you feel unsure about bleeding your radiators, get in touch with our team who will be happy to help.

“I have cold spots at the bottom of my radiators”

Cold spots at the bottom of your radiator could be caused by a buildup of scale, rust or sludge, which obstructs the flow of water.

Before a powerflush radiators are blocked

To fix this kind of cold spot, your radiators will need a powerflush.

What is a powerflush?

A powerflush breaks down the rust and debris that can cause serious buildups of sludge in radiators.

A machine is attached to your system that sends high-pressure water mixed with a powerful chemical around the system. This prevents any existing buildups of sludge or debris from becoming more serious issues.

A powerflush in use clearing a radiator blockage

Learn more about our system cleansing and powerflushing system.

Why your heating system needs regular powerflushing

Cleansing and powerflushing will improve your central heating system, help you use less energy and keep your home warm. We recommend a powerflush for your system every five years.

Arrange a powerflush.

If in doubt, ask an expert engineer

An experienced heating engineer can assess your radiator, diagnose the issue, and recommend the right solution.

We hope this guide will provide all the information you need to take the right action about cold spots in your radiator.

If you still need some advice, call our friendly team on 0800 3899 463 (Mon to Fri, 9am to 5pm) for help.


Written by Kingdom Gas Services