What does the Chaffoteaux A 03 fault code mean?

Your boiler has failed to light the flame after several attempts and has switched itself off to prevent a gas buildup.

How much does it cost to fix Chaffoteaux error code A 03?

Typical repair cost for the Chaffoteaux A 03 fault is £120-250 including labour.

After multiple attempts (following error E04), should the boiler still not sense a flame, error code A03 will appear on the LCD.

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.

7 signs repair isn't worth it anymore.