SET Low

Boiler Fault Code SET

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code SET appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is operating normally and is currently displaying the temperature you have requested it to reach. (As reported on Grant Spira)

Pick your boiler brand for the SET fix

Grant SET 1 model

Source

Information for the SET 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