BoilerFaultCodes bd Medium
Boiler Fault Code bd
Also written as BD — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code bd 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 lost connection with the remote control unit that manages your second heating zone, meaning you cannot adjust the temperature for that specific area. (As reported on Viessmann Vitodens 222-F)
Pick your boiler brand for the bd fix
Source
Information for the bd 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