How much does it cost to fix Vokera error code U 00?

Typical repair cost for the Vokera U 00 fault is £200-450 including labour.

U 00 High

Vokera U 00 Fault Code

Q: What does the Vokera U 00 fault code mean?

Your boiler's main computer control panel is reporting a general failure, meaning it cannot communicate correctly to start the heating process.

Also written as U00 — same fault.

The Vokera U 00 fault code means: your boiler's main computer control panel is reporting a general failure, meaning it cannot communicate correctly to start the heating process.. It appears on 1 Vokera model in our database.

Technical description: errors from the Master board

Typical repair cost £200-450 (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 U 00 fault code

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

Condexa Pro Repair: £200-450

Source

Vokera U 00 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