How much does it cost to fix Chaffoteaux error code E 15?

Typical repair cost for the Chaffoteaux E 15 fault is £120-180 including labour.

E 15 Low

Chaffoteaux E 15 Fault Code

Q: What does the Chaffoteaux E 15 fault code mean?

Your boiler is struggling to detect the outside temperature because the connection to the external weather sensor is disconnected or faulty.

Also written as E15 — same fault.

The Chaffoteaux E 15 fault code means: your boiler is struggling to detect the outside temperature because the connection to the external weather sensor is disconnected or faulty.. It appears on 1 Chaffoteaux model in our database.

Technical description: Outdoor sensor open circuit (where fitted)

Typical repair cost £120-180 (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 15 fault code

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

Minima HE Repair: £120-180

Source

Chaffoteaux E 15 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