How much does it cost to fix Vokera error code 15?

Typical repair cost for the Vokera 15 fault is £120-280 including labour.

15 High

Vokera 15 Fault Code

Q: What does the Vokera 15 fault code mean?

Your boiler thinks it sees a flame even though it hasn't started the ignition process yet, which is causing it to shut down for safety.

The Vokera 15 fault code means: your boiler thinks it sees a flame even though it hasn't started the ignition process yet, which is causing it to shut down for safety.. It appears on 4 Vokera models in our database.

Technical description: false flame

What causes the Vokera 15 fault?

This fault occurs when the boiler's sensors detect an electrical current that mimics a flame, even though the gas hasn't been turned on yet. This is usually caused by a dirty or damaged detection probe sending a false signal, or a fault within the main control board that misinterprets electrical background noise as a fire.

Typical repair cost £120-280 (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 15 fault code

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

Source

Vokera 15 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