What does the Chaffoteaux 3- fault code mean?

Your boiler has failed to ignite because it cannot detect a steady flow of gas, likely due to air being trapped in the supply line.

How much does it cost to fix Chaffoteaux error code 3-?

Typical repair cost for the Chaffoteaux 3- fault is £120-250 including labour.

red L.E.D. light on reset button - Purge the gas pipe and press RESET button

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.