What does the Ferroli LED 8 yellow (0) fault code mean?

Your boiler has detected that it has become too hot and has safely shut itself down to prevent damage.

How much does it cost to fix Ferroli error code LED 8 yellow (0)?

Typical repair cost for the Ferroli LED 8 yellow (0) fault is £120-250 including labour.

CH limit thermostat (50) open circuit (pump will run) or DHW limit thermostat (52) open 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.

Each noise points to a different fault.

Work through these before the call-out.

Lockout fault with a reset-needed pattern.