How much does it cost to fix Biasi error code Er 08?

Typical repair cost for the Biasi Er 08 fault is £100-£180 including labour.

Er 08 Low

Biasi Er 08 Fault Code

Q: What does the Biasi Er 08 fault code mean?

Your boiler has lost the ability to read the outside temperature, meaning it cannot automatically adjust your heating performance based on the weather.

Also written as ER08 — same fault.

The Biasi Er 08 fault code means: your boiler has lost the ability to read the outside temperature, meaning it cannot automatically adjust your heating performance based on the weather.. It appears on 21 Biasi models in our database.

Technical description: Faulty external temperature probe NTC (if fitted)

Typical repair cost £100-£180 (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 Er 08 fault code

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

Source

Biasi Er 08 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 31 August 2026