How often should my Greenstar 1000 boiler be serviced?

The boiler must be thoroughly serviced annually by a competent, qualified person such as a Worcester service engineer, British Gas engineer, or other Gas Safe registered engineer. In the Republic of Ireland, servicing must be carried out by a Worcester service engineer or other Registered Gas Installer (RGII). Regular servicing is essential to ensure continued safe, reliable and environmentally optimum operation.