How to Bleed a Radiator

cat on the radiator

Bleeding radiators can save you a few quid and keep you nice and warm in the cold season. But what does it mean to ‘bleed’ a radiator and how do you know when it’s time to do it? In simple terms, ‘bleeding’ a radiator means letting out the air that got trapped inside your heating system. Sometimes when air gets stuck hot water cannot heat the whole radiator. On top of that, you may hear sounds coming out of your radiators as they warm up. When parts of your heater feel cold it’s an indication you should consider bleeding it.

Bleeding radiators is a pretty straight forward procedure and you can do it yourself. All you need is a radiator key and a cloth to catch any surplus water.

Follow these simple steps to enjoy full benefits of you heating system:

  1. Put your heating on and wait for the radiators to get hot.
  2. Taking extra care not to burn your hands, go around the house and check every heater for any cold spots. Radiators which do not heat entirely will need bleeding.
  3. Turn your heating off and wait for the radiators to cool down.
  4.  Now you’re ready to bleed the heaters you’ve identified. Put your cloth by the radiator valve to catch any water. Then, insert the key into the valve and slowly turn it anti-clockwise. Be sure to keep your distance as hot air may come out of the valve. Also, you may hear a hissing sound at this stage.
  5. Once the sound and water stop escaping you are ready to close the valve and move onto the next radiator.
  6. After you’ve bled your radiators you should check the pressure on your boiler. If the pressure is too low, you will need to adjust it. Once that’s done you are ready to turn your heating on.

When to bleed radiators?

We recommend you perform the procedure at least once a year. If you do not feel comfortable doing it yourself, give us a ring and we’ll be more than happy to help.

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