How much does it cost to fix boiler error code Section G?

Typical repair cost for the boiler Section G fault is £150-350 including labour.

Section G High

Boiler Fault Code Section G

Also written as SECTIONG — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Section G appears across 2 boiler brands and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to control how much heat it produces, which likely means it cannot sustain a steady temperature for your radiators or hot water. (As reported on Alpha 240XE)

Pick your boiler brand for the Section G fix

Alpha Section G 1 model Baxi Section G 2 models

Source

Information for the Section G 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