BoilerFaultCodes Ignition LOCKOUT High
Boiler Fault Code Ignition LOCKOUT
Also written as IGNITIONLOCKOUT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Ignition LOCKOUT appears across 11 boiler brands and 55 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has stopped working because it failed to light the flame, which could be due to a simple issue like a gas supply problem or a fault with the internal ignition components. (As reported on Potterton Performa SL HE 9 2)
Pick your boiler brand for the Ignition LOCKOUT fix
Ariston Ignition LOCKOUT 3 models Baxi Ignition LOCKOUT 4 models Glow-worm Ignition LOCKOUT 2 models Halstead Ignition LOCKOUT 2 models Ideal Ignition LOCKOUT 18 models Johnson Starley Ignition LOCKOUT 3 models Keston Ignition LOCKOUT 8 models Main Ignition LOCKOUT 1 model Potterton Ignition LOCKOUT 8 models Pro Ignition LOCKOUT 1 model Worcester Bosch Ignition LOCKOUT 5 models
Source
Information for the Ignition 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 31 August 2026