Why does the radiator feel cold even though the heating Is on?

mans hand and radiiator

When it’s cold outside, and you want to wrap up nice and warm inside and crank your heating up, there is nothing worse than a cold radiator. If your room remains cold even when you have your heating on, then there is no doubt about the fact that you will check your radiator is actually on.

If you find that there is no heat coming off your radiator, there may be a few different issues that could be affecting it. But don’t worry, many of the problems that will cause your radiator to feel cold even when the heating is on can be easily fixed, and quite often this is something that you can do in minutes without the need to call a plumber.

Check That Your Radiator Is On

This may seem like a very obvious place to start, but often people forget that you can, in fact, turn a radiator off. Make sure that the tap at the bottom of your radiator is turned to on and is set to an adequate level of heat.

Your Radiator May Need Bleeding

If your radiator is on and is still cold, feel around and see if there are any patches that feel slightly warmer. This occurs when air builds up in your heating system, and as such, the hot water cannot travel through your radiator as it should, leaving you cold.

This build-up of air in system may coincide with knocking sounds in your radiator as your heating comes on. This is caused by the same issue.

If you have a standard valve fitted to your radiator, then there are occasions when you will need to bleed your radiator. Bleeding your radiator is the process of removing any of this trapped air so that the hot water can flow once more.

How to Bleed Your Radiator?

Unless you have a self-bleeding radiator valve, you will need to bleed your radiator manually. To do this, you will need a radiator valve key which is an inexpensive tool.

This can be quite a messy job, and you may want to put down some old towels that you don’t mind messing up. When you start to release the air, your radiator may spit out some water that may have been in your heating system for some time.

Before you start, make sure that your central heating is turned off.

To bleed your radiator, simply turn the key in the valve by a quarter to half a turn to open it. You will notice that the air will start to escape. Once the air has stopped hissing and water has started to come out, you can tighten the valve back up. Ensure you don’t over-tighten the valve.

Fit Self-Bleeding Valves

To avoid air building up in your radiators, you can fit self-bleeding valves. This will mean that you don’t have to deal with any of the messy DIY involved in maintaining your radiators and you will never have to contend with cold radiators ever again.

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