BoilerFaultCodes F.549 Medium
Boiler Fault Code F.549
Also written as F549 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.549 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 has detected an electrical fault in a sensor that helps regulate the temperature for one of your heating zones, causing that specific zone to temporarily shut down. (As reported on Viessmann Vitodens 222-F B2TF)
Pick your boiler brand for the F.549 fix
Source
Information for the F.549 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