What does the Navien E762 fault code mean?

Your boiler is struggling to detect the exhaust vent, likely because the flue pipe is not fitted securely or is the wrong size for your home.

How much does it cost to fix Navien error code E762?

Typical repair cost for the Navien E762 fault is £120-250 including labour.

Vent installation detector error; can appear if the vent pipe is not correctly sized or has not been inserted properly.

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.