How much does it cost to fix boiler error code F1A?

Typical repair cost for the boiler F1A fault is £120-200 including labour.

F1A High

Boiler Fault Code F1A

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code F1A appears across 2 boiler brands and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped working because an internal safety fuse has blown, cutting off the electrical power to the main control system. (As reported on Glow-worm Space Saver)

Pick your boiler brand for the F1A fix

Glow-worm F1A 4 models Saunier Duval F1A 1 model

Source

Information for the F1A 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 7 July 2026