d.10 Low

Boiler Fault Code d.10

Also written as D10 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code d.10 appears across 3 boiler brands and 53 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is currently reporting whether the internal water pump is running or stopped, which is a status message rather than an active error indicating a system failure. (As reported on Vaillant Turbomax Plus VUW 242EH)

Pick your boiler brand for the d.10 fix

Glow-worm d.10 8 models Heatline d.10 7 models Vaillant d.10 38 models

Source

Information for the d.10 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 31 August 2026