BoilerFaultCodes D.145 Emergency
Boiler Fault Code D.145
Also written as D145 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code D.145 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 has detected a blockage in the pipes that bring in fresh air or push out exhaust gases, so it has safely shut down to prevent unsafe operation. (As reported on Vaillant ecoTEC Plus 836)
Pick your boiler brand for the D.145 fix
Source
Information for the D.145 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