LED 2 Slow Flashing (2Hz) High

Boiler Fault Code LED 2 Slow Flashing (2Hz)

Also written as LED2SLOWFLASHING2HZ — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code LED 2 Slow Flashing (2Hz) 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 experiencing a general internal fault that is preventing it from operating correctly. (As reported on Halstead Buckingham 4)

Pick your boiler brand for the LED 2 Slow Flashing (2Hz) fix

Halstead LED 2 Slow Flashing (2Hz) 1 model

Source

Information for the LED 2 Slow Flashing (2Hz) 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