What does the Biasi E04 fault code mean?

Your boiler has detected that the water pressure is too low for it to operate safely and has shut itself down.

How much does it cost to fix Biasi error code E04?

Typical repair cost for the Biasi E04 fault is £0-120 including labour.

Locate the filling loop (usually a silver flexible hose) underneath the boiler.

Insufficient water pressure in the primary circuit

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

Six most common causes of dropping pressure.

Step-by-step using the filling loop.

7 signs repair isn't worth it anymore.