E 06 Medium

Chaffoteaux E 06 Fault Code

Also written as E06 — same fault.

The Chaffoteaux E 06 fault code means: your boiler has detected that the water inside the system is getting too cold and has activated its built-in frost protection mode to prevent pipes from freezing.. It appears on 3 Chaffoteaux models in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: Anti-freeze system, pump and burner
Typical repair cost £120-250 (including labour)

Engineer required

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

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Chaffoteaux models that show the E 06 fault code

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

Source

Chaffoteaux E 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 31 August 2026