Boiler Fault Code F.379

Also written as F379 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026

Fault code F.379 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is failing to light the gas or cannot detect that it has successfully stayed lit, resulting in the system shutting down for safety. (As reported on Viessmann Vitodens 222-F B2TF)