How much does it cost to fix boiler error code FC?

Typical repair cost for the boiler FC fault is £150-300 including labour.

FC High

Boiler Fault Code FC

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code FC appears across 2 boiler brands and 16 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's main control panel has lost communication with the internal computer, meaning it cannot display status messages or operate correctly. (As reported on Worcester Bosch 537i)

Pick your boiler brand for the FC fix

Viessmann FC 7 models Worcester Bosch FC 9 models

Source

Information for the FC 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