BoilerFaultCodes 031 High
Boiler Fault Code 031
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 031 appears across 2 boiler brands and 7 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 faulty temperature sensor reading, which is preventing it from safely heating your water and radiators. (As reported on Ideal Maximiser SE)
Pick your boiler brand for the 031 fix
Source
Information for the 031 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