What does the Navien E046 fault code mean?

Your boiler has detected that it is getting dangerously hot and has shut itself down to prevent damage or fire risk.

How much does it cost to fix Navien error code E046?

Typical repair cost for the Navien E046 fault is £150-300 including labour.

Overheat prevention switch high temperature detection (> 105°C) or switch malfunction.

This is a emergency 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.

Sludge build-up — needs flushing, not bleeding.

7 signs repair isn't worth it anymore.