BoilerFaultCodes Burner lock indicator High
Boiler Fault Code Burner lock indicator
Also written as BURNERLOCKINDICATOR — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Burner lock indicator 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 shut down because the burner failed to light or stay lit, requiring a manual reset to try and fire up again. (As reported on Ideal Icos)
Pick your boiler brand for the Burner lock indicator fix
Source
Information for the Burner lock indicator 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