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Bleed your radiators
rapped air in your radiators makes your central heating work harder, upping your bills in the process. Radiators that need bleeding will be hot at the bottom and cooler at the top when the heating is on. To bleed them, lay a towel on the floor to catch any leaks, then find the radiator bleed valve – a small metal square/screw found inside the surrounding nut. Some modern radiator valves can be opened with a flat-headed screwdriver, but if not, you can