Boiler Fault Code Fuse 2

Also written as FUSE2 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026

Fault code Fuse 2 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 The main electrical protection component for your boiler's internal computer has failed, which has completely shut down the system. (As reported on Glow-worm Swift Flow 100)