High
89 on Biasi Antares System

Your boiler has detected an issue with its internal computer board or the electricity supply coming into your home, which has caused it to stop working.

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

Internal error (usually hardware) or problems with the mains electrical supply (excessive distortion of waveform).

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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