Step 1: Turn on your heating system.
Step 2: Locate radiators on the system that will not heat up.
Step 3: Fit your vent key into the bleed valve, normally at the side of the radiator. (These can be purchased from any hardware store). It may be a good idea to have a bowl beneath the valve to catch any dripping water.
Step 4:Hold a cloth beneath the valve and the key, turn the key anticlockwise and allow the air hiss out of the valve. Turn the key slowly so you have control if water comes out. DO NOT TURN THE VALVE FULLY. A quarter to half a turn will generally do.
Step 5: Keep the valve open until water starts to bubble from the valve. Then turn the key clockwise to close the valve.
If this does not solve the heating issue please contact us and we will arrange a plumber to call out.