Search results

  1. J

    Loud noise from Worcester-Bosch Greenstar 24i combi boiler - only heating

    Hi all, My Worcester Bosch Greenstar 24i combi boiler has recently started to make a very loud buzzing / drone noise, usually within about 5 minutes to 1 hour after the heating has turned on. The problem only seems to happen when calling for heating, it has never happened when using hot water...