How much does it cost to fix Biasi error code LD1?

Typical repair cost for the Biasi LD1 fault is £100-280 including labour.

LD1 High

Biasi LD1 Fault Code

Q: What does the Biasi LD1 fault code mean?

Your boiler has lost its flame or failed to light, usually due to a lack of gas or a detection fault, meaning you have no heating or hot water.

The Biasi LD1 fault code means: your boiler has lost its flame or failed to light, usually due to a lack of gas or a detection fault, meaning you have no heating or hot water.. It appears on 2 Biasi models in our database.

Technical description: Operation light 1 (as seen in wiring and voltage diagrams)

Typical repair cost £100-280 (including labour)

DIY fix possible

Check if your gas prepay meter has credit available.Verify that other gas appliances, like a hob, are working correctly.Press the Reset button on the control panel to see if the boiler restarts.

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Biasi models that show the LD1 fault code

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

Source

Biasi LD1 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