BoilerFaultCodes 3.14 High
Boiler Fault Code 3.14
Also written as 314 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 3.14 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 detected a failure in its internal communication system, meaning it cannot properly coordinate its heating functions. (As reported on Johnson Starley Aquair S 10)
Pick your boiler brand for the 3.14 fix
Source
Information for the 3.14 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