Boiler Fault Code Other defects

Also written as OTHERDEFECTS — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code Other defects appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected an internal fault that it cannot identify, meaning it has safely shut down to prevent potential damage or unsafe operation. (As reported on Saunier Duval Isotwin F30E)