BoilerFaultCodes 381 656 High
Boiler Fault Code 381 656
Also written as 381656 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 381 656 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 unable to light the small starter flame needed to fire up the main heating system. (As reported on Ideal Mexico Super CF3 40-80)
Pick your boiler brand for the 381 656 fix
Source
Information for the 381 656 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