How much does it cost to fix Vokera error code 23/31?

Typical repair cost for the Vokera 23/31 fault is £120-250 including labour.

23/31 High

Vokera 23/31 Fault Code

Q: What does the Vokera 23/31 fault code mean?

Your boiler has detected that some of its internal electrical connections or sensors are not communicating correctly, causing the system to stop working to avoid potential damage.

Also written as 2331 — same fault.

The Vokera 23/31 fault code means: your boiler has detected that some of its internal electrical connections or sensors are not communicating correctly, causing the system to stop working to avoid potential damage.. It appears on 3 Vokera models in our database.

Technical description: Wiring fault

Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Vokera models that show the 23/31 fault code

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

Source

Vokera 23/31 fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026