BUS 485 High

Vokera BUS 485 Fault Code

Also written as BUS485 — same fault.

The Vokera BUS 485 fault code means: your boiler has lost the digital connection between its main control board and the display or smart system, meaning it cannot receive the instructions it needs to run.. It appears on 2 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: BUS 485 communication lost
Typical repair cost £120-350 (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 BUS 485 fault code

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

Source

Vokera BUS 485 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