Boiler Fault Code Intermittent lockout

Also written as INTERMITTENTLOCKOUT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code Intermittent lockout appears across 1 boiler brand and 7 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to stay lit because it cannot reliably sense the flame or is being affected by outside wind, causing it to turn itself off for safety. (As reported on Worcester Bosch Greenstar Camray Utility)