How much does it cost to fix boiler error code 231 / FD?

Typical repair cost for the boiler 231 / FD fault is £100-250 including labour.

231 / FD High

Boiler Fault Code 231 / FD

Also written as 231FD — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 231 / FD 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 disruption in its electrical supply, which has caused it to temporarily shut down the system. (As reported on Worcester Bosch Greenstar CDi Compact)

Pick your boiler brand for the 231 / FD fix

Worcester Bosch 231 / FD 1 model

Source

Information for the 231 / FD 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