What does the Chaffoteaux 8.3 fault code mean?

Your boiler is failing to keep its pilot flame lit, which means the system cannot stay fired up to provide heating or hot water.

How much does it cost to fix Chaffoteaux error code 8.3?

Typical repair cost for the Chaffoteaux 8.3 fault is £90-180 including labour.

Pilot will not stay alight

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

Older boilers — thermocouple, draught, gas supply.

Almost always a stuck diverter valve on combis.

Safety-critical — turn off, read this.