LD1, LD2 Flashing Medium

Boiler Fault Code LD1, LD2 Flashing

Also written as LD1LD2FLASHING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code LD1, LD2 Flashing 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 detected a problem with the sensor that monitors hot water temperature, which means your taps may not get warm. (As reported on Biasi Riva Compact 24S)

Pick your boiler brand for the LD1, LD2 Flashing fix

Biasi LD1, LD2 Flashing 1 model

Source

Information for the LD1, LD2 Flashing 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