E23 + RESET High

Biasi E23 + RESET Fault Code

Also written as E23RESET — same fault.

The Biasi E23 + RESET fault code means: your boiler has stopped working because it cannot safely detect or control the gas supply, causing it to lock itself for safety.. It appears on 1 Biasi model 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: Lockout EVG
Typical repair cost £180-£350 (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 E23 + RESET fault code

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

Source

Biasi E23 + RESET 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