How much does it cost to fix boiler error code B2?

Typical repair cost for the boiler B2 fault is £250-450 including labour.

B2 High

Boiler Fault Code B2

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code B2 appears across 1 boiler brand and 7 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's main electronic brain has encountered an internal error and has stopped the system from running to prevent potential damage. (As reported on Worcester Bosch Greenstar Utility 18/25)

Pick your boiler brand for the B2 fix

Worcester Bosch B2 7 models

Source

Information for the B2 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026