BoilerFaultCodes D.092 Medium
Boiler Fault Code D.092
Also written as D092 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code D.092 appears across 1 boiler brand 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 struggling to communicate correctly with the external hot water storage cylinder, which means you may experience issues with your hot water supply. (As reported on Vaillant ecoTEC Plus 836)
Pick your boiler brand for the D.092 fix
Source
Information for the D.092 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