BoilerFaultCodes D.081 Low
Boiler Fault Code D.081
Also written as D081 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code D.081 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 This code is simply an information display showing the total number of hours your boiler has spent heating your domestic hot water, rather than indicating a fault or breakdown. (As reported on Vaillant ecoTEC Pro 24)
Pick your boiler brand for the D.081 fix
Source
Information for the D.081 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