How much does it cost to fix Chaffoteaux error code 04/05/06?

Typical repair cost for the Chaffoteaux 04/05/06 fault is £120-220 including labour.

04/05/06 High

Chaffoteaux 04/05/06 Fault Code

Q: What does the Chaffoteaux 04/05/06 fault code mean?

Your boiler has stopped working because it is having trouble reading the temperature of the water being sent to your radiators.

Also written as 040506 — same fault.

The Chaffoteaux 04/05/06 fault code means: your boiler has stopped working because it is having trouble reading the temperature of the water being sent to your radiators.. It appears on 2 Chaffoteaux models in our database.

Technical description: Check heating thermistor

Typical repair cost £120-220 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Chaffoteaux models that show the 04/05/06 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Chaffoteaux 04/05/06 fault code information on this page is sourced and cross-checked against the official Chaffoteaux service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026