How much does it cost to fix Ferroli error code ER 8?

Typical repair cost for the Ferroli ER 8 fault is £120-180 including labour.

ER 8 High

Ferroli ER 8 Fault Code

Q: What does the Ferroli ER 8 fault code mean?

Your boiler is currently unable to correctly measure the temperature of the water it is heating, so it has stopped providing hot water to keep the system safe.

Also written as ER8 — same fault.

The Ferroli ER 8 fault code means: your boiler is currently unable to correctly measure the temperature of the water it is heating, so it has stopped providing hot water to keep the system safe.. It appears on 1 Ferroli model in our database.

Technical description: FAULT S.H.W. SENSOR - Defective hot water temperature sensor

Typical repair cost £120-180 (including labour)

Engineer required

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

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Ferroli models that show the ER 8 fault code

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

Xignal Repair: £120-180

Source

Ferroli ER 8 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