What does the Chaffoteaux Fig. 16 fault code mean?

Your boiler is releasing excess water outside through a safety pipe because the pressure inside the system has become too high.

How much does it cost to fix Chaffoteaux error code Fig. 16?

Typical repair cost for the Chaffoteaux Fig. 16 fault is £150-300 including labour.

Discharge from expansion relief valve

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.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.