How much does it cost to fix Chaffoteaux error code E 12?

Typical repair cost for the Chaffoteaux E 12 fault is £120-220 including labour.

E 12 High

Chaffoteaux E 12 Fault Code

Q: What does the Chaffoteaux E 12 fault code mean?

Your boiler is unable to read the water flow correctly because it has detected an electrical connection error with one of its internal sensors.

Also written as E12 — same fault.

The Chaffoteaux E 12 fault code means: your boiler is unable to read the water flow correctly because it has detected an electrical connection error with one of its internal sensors.. It appears on 1 Chaffoteaux model in our database.

Technical description: Flow sensor short circuit

Typical repair cost £120-220 (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 12 fault code

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

Minima HE Repair: £120-220

Source

Chaffoteaux E 12 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