LD1, LD2, LD3 Flashing High

Biasi LD1, LD2, LD3 Flashing Fault Code

Also written as LD1LD2LD3FLASHING — same fault.

The Biasi LD1, LD2, LD3 Flashing fault code means: your boiler has detected a problem with the internal temperature sensor that monitors the heating water, preventing the unit from operating correctly.. It appears on 1 Biasi model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Faulty C.H. temperature probe NTC in D.H.W. only models (SR 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.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Biasi models that show the LD1, LD2, LD3 Flashing fault code

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

Source

Biasi LD1, LD2, LD3 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