High
729 on Grant Vortex 15-20

Your boiler is displaying an internal identification code rather than an active fault, indicating the system's computer may need to be reset or reconfigured by a professional.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Product identifier for VTXBFCOMBI36

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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