BoilerFaultCodes F0242 High
Boiler Fault Code F0242
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F0242 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's internal computer has encountered a critical communication error and cannot operate safely. (As reported on Worcester Bosch CDi Classic)
Pick your boiler brand for the F0242 fix
Source
Information for the F0242 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