FWER High

Vokera FWER Fault Code

The Vokera FWER fault code means: your boiler's internal computer chips are failing to communicate because their software versions do not match, preventing the system from operating.. It appears on 7 Vokera models 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: WARNING FIRMWARE VERSIONS NOT COMPATIBLE
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 FWER fault code

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

Source

Vokera FWER 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