E163 High

Boiler Fault Code E163

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E163 appears across 2 boiler brands and 24 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 problem with the sensor that monitors hot water temperature, meaning you likely have no hot water or the temperature is inconsistent. (As reported on Baxi 600 Combi (range))

Pick your boiler brand for the E163 fix

Source

Information for the E163 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 27 April 2026