The radiator's air release valve is leaking

There are a number of reasons why the air release valve might be leaking. Before calling an engineer for help, we recommend:

• Tightening the air release valve (clockwise - but do not force). If this fails to cure the leak turn off the radiator at both valves (wheelhead/thermostatic³ radiator valve and lockshield valve).
• Containing the water leak temporarily. A plastic bag tucked behind the radiator may help direct the water to a suitable container.

If you're not quite sure how to carry out any of these checks, it's always a good idea to have a look at the radiator manufacturer's guidelines for help. And if you try all of the above and the problem persists, we recommend booking an engineer.

3 In very cold weather, unless the thermostatic radiator valve has a dedicated 'off' position, the valve may automatically open if the room temperature drops significantly