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How to bleed your radiators

Are you noticing a rushing or other unfamiliar noises coming from your radiators and pipes?

Not only is this annoying, but it could also lead to a cold radiator and actually start the deterioration of your heating system.

These noises indicate you may have air in your system and can cause your radiators not to heat.

You might also notice that your radiators are warm at the bottom but stay cold at the top.

Especially when the cold season starts, cold or lukewarm heating radiators can be very unpleasant. But don't worry, we will help you to take care of this issue before the cold kicks in. You simply need to bleed your radiators.

Bleeding your radiators is easy, completely safe and won't lead to any damage, even if there was no air in your heating system - as long as you carefully follow our step by step guide. Moreover, it is a quick task. Each radiator takes about five minutes for balancing. We'll show you how to do it.


1. What you need: a radiator key and a cloth

2. Switch off the heating and wait for the radiators to cool down

3. Place the radiator key in the bleeding valve normally found on one end at the top

4. Carefully turn the key three quarters to open the valve

5. Close the valve as soon as the water comes out (The water may be dirty so be sure to use that cloth.)

6. Turn your heating back on and check if the radiators get warm from bottom to top.

7. If your system is pressuried be sure to top it back up.

Before you switch your heating back on, be sure to check the water pressure of the system by looking at the pressure gauge or digital display on the boiler

The boiler should read between 1 to 1.5 bar of pressure when the central heating is cold.

If the pressure is too low, you need to refill the heating water. If you are unsure how to refill your boiler, check your instructions.

Finally, check if all radiators are warming up evenly.

Should you need any help, we are able to visit and provide a full bleed, inspection and refill. Simply visit our website and use our quote button.

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