How much does it cost to fix Biasi error code Er 10?

Typical repair cost for the Biasi Er 10 fault is £100-280 including labour.

Er 10 High

Biasi Er 10 Fault Code

Q: What does the Biasi Er 10 fault code mean?

Your boiler has detected a blockage in the condensation drainage pipe or a fault with its internal sensing system, causing it to shut down for safety.

Also written as ER10 — same fault.

The Biasi Er 10 fault code means: your boiler has detected a blockage in the condensation drainage pipe or a fault with its internal sensing system, causing it to shut down for safety.. It appears on 1 Biasi model in our database.

Technical description: Cond. drain pipe and trap / Main electronic p.c.b. / Detection electrode

Typical repair cost £100-280 (including labour)

DIY fix possible

Check the white plastic pipe leading from the boiler to the outside for signs of freezing or blockages.If frozen, gently pour warm (not boiling) water over the external section of the pipe to melt the ice.Reset the boiler by turning the control knob to the 'R' position for a few seconds.

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Biasi models that show the Er 10 fault code

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

Advance 25C Repair: £100-280

Source

Biasi Er 10 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