How much does it cost to fix Vokera error code 01?

Typical repair cost for the Vokera 01 fault is £100-£350 including labour.

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Vokera 01 Fault Code

Q: What does the Vokera 01 fault code mean?

Your boiler has failed to light or maintain a flame, which means it has locked itself out to prevent fuel from building up.

The Vokera 01 fault code means: your boiler has failed to light or maintain a flame, which means it has locked itself out to prevent fuel from building up.. It appears on 13 Vokera models in our database.

Technical description: Gas supply problem, Gas line requires purging, Reversed polarity, Broken internal flue joint, or the burner has failed to ignite, or the flame supervision system has failed to detect a flame.

What causes the Vokera 01 fault?

This fault occurs when the boiler tries to light but cannot establish a stable flame to provide heat or hot water. The most common reasons include a lack of gas reaching the burner, a buildup of carbon on the ignition probe, or a faulty component that is unable to detect that the fire has actually started. To stay safe, the boiler stops working immediately to ensure gas does not enter your home without being burned.

This fault is slightly more common in winter as cold weather can cause external gas meters or pipes to experience pressure drops, or internal components may fail under the heavy workload of heating a cold home.

Typical repair cost £100-£350 (including labour)

DIY fix possible

Check if other gas appliances (like a cooker) are working to confirm gas is reaching the propertyTurn the selector switch to the 'R' (Reset) position for a few seconds and then back to the 'ON' positionEnsure your gas meter has credit if you are on a pre-payment meter

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Vokera models that show the 01 fault code

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

Source

Vokera 01 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