How to Bleed Your Radiators

When air becomes trapped inside your central heating system, it can hinder how well it works. As the air cannot flow freely, heat doesn’t travel and the entire system fails to work as efficiently as you would like. This air builds up in the radiators specifically. Luckily, there is a way to solve the problem. This is referred to as bleeding the radiators. By releasing the air that has become trapped, bleeding your radiators can significantly improve how well the central heating system is able to heat your home. Plus, when your central heating system is working well, your home is warmer and your energy bills are cheaper.


Here’s How to Bleed Your Radiators

Once you have worked out which radiators require bleeding, it’s time to get to work. Though all of your radiators may need bleeding at the same time, this isn’t always the case. If the radiator is taking a long time to heat up or if it is cold at the top, it needs bleeding.


  • Turn Off Your Heating– Before you start bleeding your radiators, you’ll need to turn off your central heating system. Failing to do so could result in a lot of water leaking onto the floor.


  • Release the Air – Using a radiator key, slowly open the valve at the top of the radiator and allow the air to escape. You may need to use a towel, as remaining water can drip out. You’ll hear the air escaping.


  • Shut the Valve– Once the air has stopped escaping, you can shut the valve. You’ll need to be quick as once the air has escaped the water is free to move and it can travel out of the valve if it’s left open.


  • Check Your Boiler – After you have finished bleeding your radiators, it’s best to check the pressure on your boiler. It may need to be topped up.


If you are not confident in bleeding radiators yourself and you would like professional help, you can count on us. At Professional Heating Services, we offer a wide range of services. To find out more about who are and what we do, get in touch. Contact us on 01344 301 232 or via the online contact form.