How much does it cost to fix Chaffoteaux error code Overheat detection?

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

Overheat detection High

Chaffoteaux Overheat detection Fault Code

Q: What does the Chaffoteaux Overheat detection fault code mean?

Your boiler has shut itself down because it detected that it is running too hot, indicating a potential circulation or sensor problem.

Also written as OVERHEATDETECTION — same fault.

The Chaffoteaux Overheat detection fault code means: your boiler has shut itself down because it detected that it is running too hot, indicating a potential circulation or sensor problem.. It appears on 3 Chaffoteaux models in our database.

Technical description: If an overheat is detected by the sensor (13), the grey security solenoid (30) and the blue 1/3 (31) closes, the orange indicator lamp (21) extinguishes. The ignitor is energised for 8 seconds and the red lockout indicator (22) lights.

Typical repair cost £120-250 (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 Overheat detection fault code

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

Source

Chaffoteaux Overheat detection 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