What does the Biasi 89 fault code mean?

Your boiler's internal computer has encountered a technical glitch or an issue with the electrical power coming into your home.

How much does it cost to fix Biasi error code 89?

Typical repair cost for the Biasi 89 fault is £180-450 including labour.

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

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

Work through these before the call-out.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.