Boiler Fault Code F.416

Also written as F416 — same fault.

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

Fault code F.416 appears across 1 boiler brand and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has shut down because it detects that a safety heat sensor is not in the correct position, which prevents it from monitoring exhaust gases safely. (As reported on Viessmann Vitodens 200-W B2KF Combi)