Boiler Fault Code EE 3333

Also written as EE3333 — same fault.

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

Fault code EE 3333 appears across 1 boiler brand and 4 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 fan is spinning even though you aren't trying to use your heating or hot water, which suggests a possible electronic sensor error. (As reported on Ariston E-Combi One 30)