Normal servicing of our boilers is not carried out by or on behalf of Ariston Thermo UK Ltd. The servicing costs and the cost of parts is a private commercial arrangement between the customer and the service engineer therefore considerations such as your location as well as location and the state of the boiler appliance (e.g. ease of access). We advise that you always get more than one quote for the work required and most importantly use a Gas Safe registered engineer for any work involving gas. All Ariston products and spares are sold solely via Builders and Plumbers merchants and as such there is no official retail price therefore we suggest that you shop around for a good price.