Our WB 34cdi boiler was fitted just over 2 years ago. Its been serviced twice since fitting (to satisfy the 10 year guarantee) and is operating fine. When installed by a Worcester Bosch Accredited Installer with a Greenstar System Filter. The Greenstar 1000 and Greenstar 2000 guarantee is available as standard to both Excelerate members and non-WAI's, when fitted with any brand of system filter. Terms and conditions apply. Easily operated alternative to the filling key or hose pipe which customers often lose or find difficult to use Based on installing a new A-rated condensing boiler in England, Scotland and Wales with a programmer, room thermostat and thermostatic radiator controls (TRVs) in a gas heated detached home from an older G-rated boiler with a programmer and room thermostat. Figures are based on fuel prices as of October2023. Savings will vary depending on the size and thermal performance of your home. Source: Energy Saving Trust. So, why is nothing happening in response to the lever being pulled down? Has the last engineer turned an isolating valve off somewhere? Am I being stupid and going about the process the wrong way? Is there a fault with the valve or is the system not refilling as it is up to pressure? Either way, I obviously do not want to buy and fit a new radiator if I am going to end up calling an engineer to help refill my system afterwards, I may as well get a plumber to do the whole job.