How much does it cost to fix Vokera error code 20/21/22?

Typical repair cost for the Vokera 20/21/22 fault is £180-350 including labour.

20/21/22 High

Vokera 20/21/22 Fault Code

Q: What does the Vokera 20/21/22 fault code mean?

Your boiler has detected that it is running much hotter than it should be and has switched itself off to prevent overheating.

Also written as 202122 — same fault.

The Vokera 20/21/22 fault code means: your boiler has detected that it is running much hotter than it should be and has switched itself off to prevent overheating.. It appears on 3 Vokera models in our database.

Technical description: Heat exchanger temperature too high

Typical repair cost £180-350 (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 20/21/22 fault code

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

Source

Vokera 20/21/22 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