If the radiator is cold at the top but warm at the bottom, it's likely to have trapped air and needs to be 'bled'.
This easy process allows any trapped air to be ejected from the radiator. It can be done at your home with no need for a plumber.
- Turn off the central heating
- Find the Bleed key
- Locate the bleed valve
- Protect the environment
- Bleed the radiator
- Turn the bleed valve tight
- Turn off the heat
Turn off the central heating
To ensure that there is no air trapped in the radiator's system, ensure the heating source is turned off before you start bleeding it.
Search the bleed key
You should have received the small bleed key, or radiator key, with your radiator. If you don't, don't worry. You should be able to find one at your local DIY store and purchase a replacement.
Locate the bleed valve
The bleed valve is usually located near the top of the radiator on either side.
Protect the region
Wrap a towel or small cloth around the bleed valve to catch any potential leakages. To protect your hand, wrap it in a towel.
Bleeding the radiator
The lees essential should be inserted into the bleed valve. Turn it slowly and carefully. A quarter turn is normal. You will hear a hissing sound as any air trapped in the radiator is released. It is time to let the water out!
Close the bleed valve
After the water has started to leak, tighten the valve to its original position. You can wipe it clean, but be careful because the water can get boiling.
Turn the heat back on
After you have finished bleeding your radiator(s), turn on your central heating system. Give them a few hours to cool down and check on them again to make sure they are warm. Done!
It is better to hire a professional to solve a DIY problem than make it worse.
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