110 High

Boiler Fault Code 110

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 110 appears across 6 boiler brands and 39 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has switched itself off because it has reached too high a temperature, likely due to trapped air or a blockage stopping water from circulating. (As reported on Baxi EcoBlue)

Pick your boiler brand for the 110 fix

Ariston 110 1 model Atag 110 4 models Baxi 110 26 models Main 110 1 model Navien 110 6 models Potterton 110 1 model

Source

Information for the 110 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