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Bleeding your Radiator

Are you finding that your radiator isn’t performing as efficiently as possible, or that there is a lack of heat being generated? Without your radiator producing the desired heat output, you could be spending money unnecessarily on heating bills.

This could be caused by air bubbles in your central heating system, which can stop hot water from successfully circulating around your home, preventing radiators from reaching their maximum efficiency and making the heating process slower. Trapped air can also cause loud and irritating noises, to come from your heating system, which may seem very serious at first.

Before you call out an engineer to try and solve the issue, it could be that your radiator needs bleeding, for it to start producing the expected heat output. Engineers suggest that you should bleed your radiator once a year to maintain the full effect and efficiency, without this, you will notice a clear lack of heat coming from the radiator.

Follow the steps below to successfully bleed your radiator:
1) Firstly, you will need to turn off your heating, so your radiator is cool enough to touch. Once you have located what radiators require bleeding by sourcing cold spots, you will need to find a radiator key, however some newer radiators can be bled with a screwdriver. When bleeding your radiator, you will also need a cloth and a tray or pot to collect any released water.

2) Using a cloth to protect your hands, twist your radiator key (often anti-clockwise). If the radiator has any air trapped inside it then you should initially hear a hissing noise, which is the sound of the air being pushed out of the radiator as water takes its place. When all the air is removed water will be released out the radiator valve. As soon as this happens, you should twist the key back to its original position.

3) Repeat the same process for any other radiators that require bleeding before turning your central heating system back on.

Checking your boiler pressure:
After turning your central heating system back on, you should check the boiler pressure to ensure everything is running smoothly. If the water pressure has dropped slightly, you will need to re-pressurise it using instructions from the manual or manufacturer.
If it appears that this hasn’t worked as effectively as you’d hoped, it could be that the radiator needs bleeding again to get the full effect.

If bleeding your radiators doesn’t work, we would advise that an engineer is called to check out the issue.