BoilerFaultCodes 381 High
Boiler Fault Code 381
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 381 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 because the flame inside went out while it was trying to heat your water or home. (As reported on Viessmann Vitodens 100-W B1GA)
Pick your boiler brand for the 381 fix
Source
Information for the 381 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