BoilerFaultCodes DM009 Low
Boiler Fault Code DM009
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code DM009 appears across 1 boiler brand and 1 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 in a setup or holiday mode rather than standard heating operation. (As reported on Baxi 400 Combi 2)
Pick your boiler brand for the DM009 fix
Source
Information for the DM009 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