BoilerFaultCodes 12-69 High
Boiler Fault Code 12-69
Also written as 1269 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 12-69 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 is struggling to automatically adjust its internal settings to ensure the gas burns efficiently, which may lead to it shutting down for safety. (As reported on Daikin D2CND)
Pick your boiler brand for the 12-69 fix
Source
Information for the 12-69 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