What does the Biasi Fan rpm not exact fault code mean?

Your boiler is unable to start or stay on because the internal fan is not spinning at the correct speed to safely clear away exhaust fumes.

How much does it cost to fix Biasi error code Fan rpm not exact?

Typical repair cost for the Biasi Fan rpm not exact fault is £180-350 including labour.

System checks fan speed; if not exact, it prevents ignition or leads to lock-out light.

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

Each noise points to a different fault.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.