How much does it cost to fix Ferroli error code ER 6?

Typical repair cost for the Ferroli ER 6 fault is £120-250 including labour.

ER 6 High

Ferroli ER 6 Fault Code

Q: What does the Ferroli ER 6 fault code mean?

Your boiler has detected that the water inside the system has become dangerously hot and has shut itself down to prevent damage or overheating.

Also written as ER6 — same fault.

The Ferroli ER 6 fault code means: your boiler has detected that the water inside the system has become dangerously hot and has shut itself down to prevent damage or overheating.. It appears on 1 Ferroli model in our database.

Technical description: BROKEN PROTECT SENSOR - Water temperature too high

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 6 fault code

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

Xignal Repair: £120-250

Source

Ferroli ER 6 fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026