1 06 High

Chaffoteaux 1 06 Fault Code

Also written as 106 — same fault.

The Chaffoteaux 1 06 fault code means: your boiler has detected that water is not moving around your heating system properly, which has caused it to stop working to prevent damage.. It appears on 1 Chaffoteaux model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Circulation insuffisante
Typical repair cost £120-250 (including labour)

DIY fix possible

Check the system pressure gauge on the front of the boiler; if it is below 1 bar, use the filling loop to top it up to 1.5 bar.Ensure all radiator valves are fully open to allow water to circulate freely.Reset the boiler using the reset button on the control panel.

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Chaffoteaux models that show the 1 06 fault code

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

Source

Chaffoteaux 1 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 7 July 2026