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

Typical repair cost for the boiler Fd fault is £0-80 including labour.

Fd Low

Boiler Fault Code Fd

Also written as FD — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Fd appears across 3 boiler brands and 59 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is showing this code simply because the reset button was held down for too long or pressed by mistake, which has confused the internal software. (As reported on Worcester Bosch Greenstar 12i System)

Pick your boiler brand for the Fd fix

Ideal Fd 11 models Viessmann Fd 9 models Worcester Bosch Fd 39 models

Source

Information for the 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