Radiator troubleshooting

To bleed a radiator you'll need a:

• radiator bleed key (bought from a DIY shop)
• dry cloth
• cold central heating system

Then:

1. For safety, turn the central heating and hot water off on the timer/programmer
2. Place the dry cloth under the radiator to catch any water that may come out
3. Find the square bleed screw at the top, side or back of the radiator
4. Insert the bleed key and turn it slowly anti-clockwise (no more than 2 turns as the screw should not be removed completely) until you hear a hissing noise
5. Wait until the hissing stops and you start to see small amounts of water coming from the bleed screw
6. Re-tighten the screw but be careful not to over-tighten it

If your boiler is a combination boiler, check the pressure gauge on the front of the boiler. 

If it's below its normal setting, you'll need to add water to your boiler. Find out how to do this in your boiler manual.

Then turn the heating on and the room thermostat up.

If this does not work book an engineer.

Report a repair