What does the Biasi Li01 fault code mean?

Your boiler has shut down because the internal water temperature has become too hot while trying to provide hot water.

How much does it cost to fix Biasi error code Li01?

Typical repair cost for the Biasi Li01 fault is £100-280 including labour.

Check that the radiator valves and the main boiler valves are fully open

Primary circuit temperature limit during d.h.w. operation

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

Almost always a stuck diverter valve on combis.

Each noise points to a different fault.

Sludge build-up — needs flushing, not bleeding.