What does the Biasi E85 fault code mean?

Your boiler has detected that water is not moving around the system properly, which has caused it to shut down to prevent overheating.

How much does it cost to fix Biasi error code E85?

Typical repair cost for the Biasi E85 fault is £180-350 including labour.

Check that your boiler pressure is between 1.0 and 1.5 bar on the front gauge

Circulation failure (internal check)

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.

Lockout fault with a reset-needed pattern.

Sludge build-up — needs flushing, not bleeding.