What does the Chaffoteaux 03 fault code mean?

Your boiler is failing to light the gas or isn't recognizing that a flame is present, meaning your heating and hot water will not work.

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

Typical repair cost for the Chaffoteaux 03 fault is £120-£350 including labour.

Check if other gas appliances in your home are working to ensure gas is being supplied

No flame detection

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

Almost always a stuck diverter valve on combis.

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.