How much does it cost to fix boiler error code FALSE FLAME LOCKOUT?

Typical repair cost for the boiler FALSE FLAME LOCKOUT fault is £120-350 including labour.

FALSE FLAME LOCKOUT High

Boiler Fault Code FALSE FLAME LOCKOUT

Also written as FALSEFLAMELOCKOUT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code FALSE FLAME LOCKOUT 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 a flame when there shouldn't be one, causing it to shut down for safety. (As reported on Johnson Starley J32 System ET)

Pick your boiler brand for the FALSE FLAME LOCKOUT fix

Johnson Starley FALSE FLAME LOCKOUT 1 model

Source

Information for the FALSE FLAME LOCKOUT 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