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Trapped air stops warm water from circulating around your radiator, making your radiator cold at the top and warm at the bottom. When your radiator is full of trapped air, it can take longer to warm up your room and cost you more money. To fix this and make your radiator more efficient, you need to bleed your radiator. Express.co.uk chatted to Heatable.co.uk’s Gas Registered engineer Ben Mars to find out how to bleed a radiator.
If you have noisy radiators or radiators that don’t heat up evenly, they’re probably trapped with air and need bleeding.
Ben said: “Over time excess air can build up within your central heating system, leading to cold spots in your radiators and the uneven distribution of heat throughout your central heating system.
“To rid your system of the excess air, you need to periodically bleed your radiators, ideally once a year.”
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Once you have completed bleeding all of your radiators, Ben said you may discover that your system’s pressure has dropped and will need topping up.
He explained: “You can build it back up again by adding water via the filling valve.”
The filling valve is usually very near or located on the underside of the boiler and fixed to the pipework.
It is a short braided hose with connections at either end.
