How much does it cost to fix Vokera error code C1?

Typical repair cost for the Vokera C1 fault is £250-450 including labour.

C1 High

Vokera C1 Fault Code

Q: What does the Vokera C1 fault code mean?

Your boiler's main internal computer has detected a serious technical error and needs to be reset or potentially replaced by a professional.

The Vokera C1 fault code means: your boiler's main internal computer has detected a serious technical error and needs to be reset or potentially replaced by a professional.. It appears on 3 Vokera models in our database.

Technical description: Fault code requiring PCB replacement or test restart

Typical repair cost £250-450 (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 C1 fault code

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

Linea 24 Repair: £250-450
Linea 28 Repair: £250-450
Linea 7 Repair: £250-450

Source

Vokera C1 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