Boiler Fault Code A LED 2

Also written as ALED2 — same fault.

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

Fault code A LED 2 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 is failing to detect that you have turned on a hot water tap, so it is choosing not to heat the water for your shower or kitchen taps. (As reported on Ferroli Arean)