LED 1 Low

Boiler Fault Code LED 1

Also written as LED1 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code LED 1 appears across 4 boiler brands and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is currently checking that there is enough airflow for it to start up safely; this light should turn off automatically once the system is ready to fire. (As reported on Myson Midas 100)

Pick your boiler brand for the LED 1 fix

Ferroli LED 1 1 model Glow-worm LED 1 1 model Ideal LED 1 1 model Myson LED 1 3 models

Source

Information for the LED 1 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