LD1, LD2 Flashing Medium

Biasi LD1, LD2 Flashing Fault Code

Also written as LD1LD2FLASHING — same fault.

The Biasi LD1, LD2 Flashing fault code means: your boiler has detected a problem with the sensor that monitors hot water temperature, which means your taps may not get warm.. It appears on 1 Biasi model in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: Faulty D.H.W. temperature probe NTC (SM models)
Typical repair cost £90-160 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Biasi models that show the LD1, LD2 Flashing fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Biasi LD1, LD2 Flashing fault code information on this page is sourced and cross-checked against the official Biasi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026