BoilerFaultCodes Boiler at lock out High
Boiler Fault Code Boiler at lock out
Also written as BOILERATLOCKOUT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Boiler at lock out 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 stopped working as a safety precaution and needs to be manually restarted to see if it can clear the internal error. (As reported on Potterton Statesman)
Pick your boiler brand for the Boiler at lock out fix
Source
Information for the Boiler at lock out 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