BoilerFaultCodes Overheat Lockout 1/4 High
Boiler Fault Code Overheat Lockout 1/4
Also written as OVERHEATLOCKOUT14 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Overheat Lockout 1/4 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 internal water pressure has dropped too low to operate safely, causing it to get too hot. (As reported on Ideal Logic+ Combi C)
Pick your boiler brand for the Overheat Lockout 1/4 fix
Source
Information for the Overheat Lockout 1/4 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