E 20 Emergency

Vokera E 20 Fault Code

Also written as E20 — same fault.

The Vokera E 20 fault code means: your boiler has detected a safety fault where it thinks a flame is present when it should be turned off, so it has shut itself down to keep your home safe.. It appears on 1 Vokera model in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: Flame detected with gas valve closed. Internal software error. Replace the circuit board.
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 E 20 fault code

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

Source

Vokera E 20 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 7 July 2026