How much does it cost to fix Ferroli error code ER 15?

Typical repair cost for the Ferroli ER 15 fault is £120-250 including labour.

ER 15 High

Ferroli ER 15 Fault Code

Q: What does the Ferroli ER 15 fault code mean?

Your boiler has detected that the water inside it is dangerously hot and has shut itself down to prevent any damage.

Also written as ER15 — same fault.

The Ferroli ER 15 fault code means: your boiler has detected that the water inside it is dangerously hot and has shut itself down to prevent any damage.. It appears on 1 Ferroli model in our database.

Technical description: BROKEN ABOVE LIMIT - The water temperature has reached the safety limit

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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Ferroli models that show the ER 15 fault code

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

Xignal Repair: £120-250

Source

Ferroli ER 15 fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.

Ferroli Xignal manual (PDF)

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026