ECO-button lit Low

Boiler Fault Code ECO-button lit

Also written as ECOBUTTONLIT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code ECO-button lit 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 currently in 'Comfort Mode', which means it keeps a small amount of water hot inside the unit so that your taps get warm faster. (As reported on Worcester Bosch Greenstar 25 HE Combi)

Pick your boiler brand for the ECO-button lit fix

Worcester Bosch ECO-button lit 1 model

Source

Information for the ECO-button lit 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