Medium
Noisy operation on Worcester Bosch Greenstar 8000

Your boiler is making unusual rattling or grinding noises, which usually suggests there is trapped air in the system or a internal mechanical part is starting to wear out.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Pump noise from air in pump or worn pump; Worn motor bearings; Fan out of balance

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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