Gas Boiler Service This is for an annual boiler service usually taking between 1hr - 1.5hrs. Any parts that are required will be charged accordingly at parts plus labor. This will be agreed before undertaking any further works. We assume that the appliance is in good working order prior to the service. If there are any known defects please make us aware so that this can be addressed before the service is carried out. Please make sure that the appliance is turn off prior to you appointment so that it is cold for us to work on. Please Note. We are Gas Safe Registered and carry our ID Cards. We are accredited with all the leading gas boiler manufactures. We attended their regular in house training and have regular update's from them. This applies if you have a current manufactures warranty on your appliance.