COM High

Vokera COM Fault Code

The Vokera COM fault code means: your boiler's internal computer is having trouble talking to the control panel, meaning the unit cannot receive instructions to provide heating or hot water.. 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: Lost comunication between user interface and boiler board
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 COM fault code

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

Source

Vokera COM 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