How to Clean the Central Heating System.
Is your radiator giving off a very bad smell of bad eggs or similar when you bleed them of air? (the removal of air via the air vent) Then this could probably be a build-up of a chemical called hydrogen sulphide in the water. Hydrogen Sulphide which can build up in the heating system not only causes a bad smell but will cause corrosion and sludge within your central heating system over time and will need removing. A few good brands of central heating cleaner and inhibitors av