E05 High

Biasi E05 Fault Code

The Biasi E05 fault code means: your boiler has stopped working because the fan that helps remove waste gases is not spinning at the correct speed or communicating properly with the control board.. It appears on 12 Biasi models 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 fan control system
Typical repair cost £220-£450 (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 E05 fault code

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

Source

Biasi E05 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