Tips to fix a cold radiator, learn how to balance your radiator

Cold radiators in different parts of the home

Radiator issues can be frustrating. If you’ve identified a cold radiator, this may be due to a problem with one of the zones in your central heating system; but don’t worry, one of HomeServe’s qualified engineers could have this fixed in no time.

 

Central heating systems work by pumping a continuous flow of hot-water from the boiler to the radiators, then back to the boiler to pick up more heat. Within this system, you could create ‘zones.’ This means that you could control the temperature in separate areas of your home, depending on your heating requirements in each room. If you find that radiators are cold in one area, it could indicate that there is a problem with a particular zone.

 

Get a new boiler quote   

 

Check your zone timer or thermostat

The first thing to do is check that the thermostatic radiator valve isn’t set too low. You could also check that the lockshield valve, at the other end of the radiator, is in the correct position. This regulates the flow of hot water that passes through the radiator – so it might need adjusting.

 

Check the zone valve

It is also possible that you have a faulty diverter valve. This valve is inside your boiler and switches between sending hot-water to your taps or to your radiators. It typically gives priority to your hot water. If you are not getting hot water when you turn on the taps, or if you have to turn on the heating to get hot-water, the valve could be jamming. In this case, you will need to contact a Gas Safe registered engineer to come and fix this problem.

 

Cold radiators upstairs

It is also possible that you have a faulty diverter valve. This valve is inside your boiler and switches between sending hot-water to your taps or to your radiators. It typically gives priority to your hot water. If you are not getting hot water when you turn on the taps, or if you have to turn on the heating to get hot-water, the valve could be jamming. In this case, you will need to contact a Gas Safe registered engineer to come and fix this problem.

 

Cold radiators downstairs

Cold radiators on the lower levels of your home could indicate that there is a problem with your pump, thus not producing enough power to push the water around the heating system. Pumps can get warm, but if it is hot or making a grating sound, then it might be about to break down, in which case it could be worth replacing. One of HomeServe’s Gas Safe registered engineers could provide advice and help to rectify this issue.

 

Just one radiator stays cold

If you find that one radiator within your home stays cold, ensure that the valves located on the sides of the radiator are open. If the valves are open, but the radiator is still cold, it’s possible that the valves are blocked. A system Powerflush conducted by a qualified engineer will usually do the trick.

 

The qualified, Gas Safe registered engineers at HomeServe are more than capable of diagnosing an issue with your radiators and central heating system; they’ll also seek to provide you with an effective solution. Get in touch today to book an appointment.

 

It is crucial to remember that you should only perform checks on your boiler that are simple with minimum risk. Do not attempt to fix the issue yourself as this could be extremely dangerous.

 

All of our engineers are Gas Safe-registered and fully qualified to diagnose and fix your central heating problems, so whether you know what the problem is or not, you can book an appointment with a local expert to diagnose the issue and get your heating back up and running effectively again.

 

Get a new boiler quote   

 

Information and other materials on this website are not intended to constitute professional advice and should not be relied upon. Please see our Terms of Use for further details.

Related articles


Bleeding a radiator

How to bleed a radiator

Bleeding a radiator is an easy and cheap fix for combatting cold and patchy radiators. It's something anyone can do in their own home without the need...
Cold patched on a radiator

How to fix cold patches on radiators at the top, middle or bottom

Cold patches appear on radiators when your water supply is unable to properly flow through your central heating system due to air or substances such...
Central heating home guide

5 Energy saving tips to make the most out of your central heating

While the lifespan of the average boiler is 12 years, it’s important to maintain it regularly to ensure maximum longevity. If your boiler and central...