BoilerFaultCodes D.162 Low
Boiler Fault Code D.162
Also written as D162 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code D.162 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 communicate correctly with your outdoor temperature sensor, meaning it cannot automatically adjust your heating based on the weather outside. (As reported on Vaillant ecoTEC Plus 836)
Pick your boiler brand for the D.162 fix
Source
Information for the D.162 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