lockout LED 2 ON High

Boiler Fault Code lockout LED 2 ON

Also written as LOCKOUTLED2ON — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code lockout LED 2 ON 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 has tried to light several times but cannot detect a flame, causing the system to shut down for safety. (As reported on Ideal Response)

Pick your boiler brand for the lockout LED 2 ON fix

Ideal lockout LED 2 ON 1 model

Source

Information for the lockout LED 2 ON 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 27 April 2026