BoilerFaultCodes EE9 High
Boiler Fault Code EE9
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code EE9 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 has detected a communication issue or a fault with one of its internal ignition electrodes, meaning it cannot safely light the burner. (As reported on Worcester Bosch WR325 RSF)
Pick your boiler brand for the EE9 fix
Source
Information for the EE9 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