High
Fault finding (Page 9 - 10) on Saunier Duval Opalia

The boiler documentation is incomplete and does not define the specific fault code, so the system remains in an unknown error state.

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

The provided text ends before reaching the specific fault finding code table on pages 9 and 10.

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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