If your radiators are warm at the bottom but cold at the top, trapped air is stopping hot water from circulating. Bleeding the radiator releases that air and restores even heat.
Turn your heating off and let the radiators cool. Hold a cloth under the bleed valve at the top corner and turn the bleed key anti-clockwise a quarter turn. You’ll hear a hiss as air escapes.
When water starts to dribble out, close the valve again. Once you’ve done every radiator, check your boiler pressure, you may need to top it up to around 1.2 bar.
If radiators keep needing bleeding, or the boiler loses pressure repeatedly, give us a call, it usually points to a leak or a failing part worth checking.
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