What does the Chaffoteaux 7.ii fault code mean?

Your boiler is releasing excess water because it is under too much pressure and hasn't been properly disconnected from the main water supply.

How much does it cost to fix Chaffoteaux error code 7.ii?

Typical repair cost for the Chaffoteaux 7.ii fault is £120-280 including labour.

Safety valve discharges - Not isolated from mains

This is a emergency 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.

Safety-critical — turn off, read this.