What does the Keston E31 fault code mean?

Your boiler has lost communication with the internal sensor that monitors water temperature, causing the system to shut down as a safety precaution.

How much does it cost to fix Keston error code E31?

Typical repair cost for the Keston E31 fault is £90-180 including labour.

Flow sensor open circuit – check connections to flow sensor are in place

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

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.