BoilerFaultCodes D.052 High
Boiler Fault Code D.052
Also written as D052 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code D.052 appears across 1 boiler brand and 3 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 correctly control the amount of gas flowing into the burner, meaning it cannot safely ignite or maintain a steady flame. (As reported on Vaillant ecoTEC plus)
Pick your boiler brand for the D.052 fix
Source
Information for the D.052 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