918 High

Vokera 918 Fault Code

The Vokera 918 fault code means: your boiler is unable to move water around your heating system because the internal pump is stuck or the valves that let water flow to your radiators are shut.. It appears on 1 Vokera model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Pump seized, Flow/return service valve closed
Typical repair cost £150-300 (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 918 fault code

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

Source

Vokera 918 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