BoilerFaultCodes EH258 High
Boiler Fault Code EH258
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code EH258 appears across 1 boiler brand and 2 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 or control module has developed a fault and can no longer communicate with the rest of the system. (As reported on Worcester Bosch CDi Classic)
Pick your boiler brand for the EH258 fix
Source
Information for the EH258 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