How much does it cost to fix boiler error code F (Ignition fault shown)?

Typical repair cost for the boiler F (Ignition fault shown) fault is £150-250 including labour.

F (Ignition fault shown) High

Boiler Fault Code F (Ignition fault shown)

Also written as FIGNITIONFAULTSHOWN — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code F (Ignition fault shown) 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 is failing to light the internal flame needed to heat your water and home. (As reported on Saunier Duval Thema F 30 E Plus)

Pick your boiler brand for the F (Ignition fault shown) fix

Saunier Duval F (Ignition fault shown) 1 model

Source

Information for the F (Ignition fault shown) 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