be Medium
Boiler Fault Code be
Also written as BE — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code be appears across 2 boiler brands and 7 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is having trouble communicating with the wall-mounted thermostat control because of a setup or configuration error. (As reported on Viessmann Vitodens 200-W)
Pick your boiler brand for the be fix
Source
Information for the be 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