Boiler Fault Code LED2-5 (yellow)

Also written as LED25YELLOW — same fault.

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

Fault code LED2-5 (yellow) 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 signalling that the water temperature sensors are detecting an unusual reading, which is causing it to pause normal operation to prevent damage. (As reported on Ferroli Arena)