What does the Biasi E05 fault code mean?

Your boiler is failing to light the gas flame despite several attempts, meaning it cannot provide heat or hot water.

How much does it cost to fix Biasi error code E05?

Typical repair cost for the Biasi E05 fault is £100-£280 including labour.

Check that your gas stopcock or meter valve is fully open and you have credit on your meter.

Flame detection failure - after several attempts

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.

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.