BoilerFaultCodes L 06 High
Boiler Fault Code L 06
Also written as L06 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code L 06 appears across 1 boiler brand and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler thinks a flame is present before the gas has even started flowing, which is a safety conflict that prevents the system from starting. (As reported on Ideal Independent System2 S15)
Pick your boiler brand for the L 06 fix
Source
Information for the L 06 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