What does the Biasi E01 fault code mean?

Your boiler has failed to light or cannot detect a flame, meaning your heating and hot water will not work until it is reset or repaired.

How much does it cost to fix Biasi error code E01?

Typical repair cost for the Biasi E01 fault is £100-280 including labour.

Check if other gas appliances in your home, like a hob, are working to ensure gas supply.

Ignition lockout or no flame detection

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

Lockout fault with a reset-needed pattern.

Almost always a stuck diverter valve on combis.

Older boilers — thermocouple, draught, gas supply.