How much does it cost to fix boiler error code GAS VALVE NOT OPENING?

Typical repair cost for the boiler GAS VALVE NOT OPENING fault is £180-350 including labour.

GAS VALVE NOT OPENING High

Boiler Fault Code GAS VALVE NOT OPENING

Also written as GASVALVENOTOPENING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code GAS VALVE NOT OPENING 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 unable to release gas into the burner to create a flame, meaning your heating will not work. (As reported on Johnson Starley Warmcair DW)

Pick your boiler brand for the GAS VALVE NOT OPENING fix

Johnson Starley GAS VALVE NOT OPENING 1 model

Source

Information for the GAS VALVE NOT OPENING 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