What does the Biasi lock-out fault code mean?

Your boiler has switched itself off because it has detected that it is getting too hot or there is a problem with the exhaust temperature.

How much does it cost to fix Biasi error code lock-out?

Typical repair cost for the Biasi lock-out fault is £90-280 including labour.

Check that all radiator valves are fully open

Safety thermostat or flue temperature probe lockout

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.

Work through these before the call-out.

Lockout fault with a reset-needed pattern.