How much does it cost to fix boiler error code G2?

Typical repair cost for the boiler G2 fault is £90-180 including labour.

G2 High

Boiler Fault Code G2

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code G2 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected an issue with the cold water arriving at the unit, meaning it cannot safely heat water for your taps or shower. (As reported on Worcester Bosch WR325 RSF)

Pick your boiler brand for the G2 fix

Worcester Bosch G2 1 model

Source

Information for the G2 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