BoilerFaultCodes F0 259 High
Boiler Fault Code F0 259
Also written as F0259 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F0 259 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 computer is experiencing a internal communication error that is preventing it from starting up correctly. (As reported on Worcester Bosch Greenstar CDi Compact)
Pick your boiler brand for the F0 259 fix
Source
Information for the F0 259 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