BoilerFaultCodes D.010 High
Boiler Fault Code D.010
Also written as D010 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code D.010 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 having trouble moving water through the system because the internal pump, which acts as the heart of the boiler, is failing to respond correctly. (As reported on Vaillant ecoTEC Pro 28)
Pick your boiler brand for the D.010 fix
Source
Information for the D.010 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