rattling from new heatslave ii

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    New Worcester Bosch HeatSlave II External 18/25 problem

    Hi New member. Interested to know whether anyone has experienced the same problem as me with my new boiler: rattling noise from the boiler (only) when hot water called for. WB have had an engineer out to my property, and had almost every part of the boiler replaced, and still have no clue what...