LED 4 (Permanent) Low

Boiler Fault Code LED 4 (Permanent)

Also written as LED4PERMANENT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code LED 4 (Permanent) 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 currently operating normally and is actively heating your radiators. (As reported on Ferroli Modena HE)

Pick your boiler brand for the LED 4 (Permanent) fix

Ferroli LED 4 (Permanent) 2 models

Source

Information for the LED 4 (Permanent) 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