How much does it cost to fix boiler error code GK200?

Typical repair cost for the boiler GK200 fault is £150-300 including labour.

GK200 High

Boiler Fault Code GK200

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code GK200 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 is failing to light the burner because it is struggling to initiate the start-up sequence. (As reported on Grant Vortex)

Pick your boiler brand for the GK200 fix

Grant GK200 1 model

Source

Information for the GK200 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 7 July 2026