What does the Navien Repeated ignition failure fault code mean?

Your boiler is failing to light the fuel safely and has shut itself down to prevent a gas buildup.

How much does it cost to fix Navien error code Repeated ignition failure?

Typical repair cost for the Navien Repeated ignition failure fault is £150-350 including labour.

Flame error, Flame loss and noise occurs at ignition, or Improper air intake air supply.

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

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.

Safety-critical — turn off, read this.