08E Low

Biasi 08E Fault Code

The Biasi 08E fault code means: your boiler is struggling to read the outdoor temperature, which might cause your heating to run less efficiently or feel slightly out of sync with the weather.. It appears on 5 Biasi models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Faulty external temp. probe
Typical repair cost £120-180 (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 08E fault code

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

Source

Biasi 08E 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