Boiler Fault Code 1-EA

Also written as 1EA — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code 1-EA appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal computer has identified a mismatch or issue with its software version, which prevents it from operating correctly. (As reported on Worcester Bosch Greenstar 8000 Life/Style)