How much does it cost to fix Ferroli error code ER 10?

Typical repair cost for the Ferroli ER 10 fault is £80-150 including labour.

ER 10 High

Ferroli ER 10 Fault Code

Q: What does the Ferroli ER 10 fault code mean?

Your boiler has stopped working because it does not have enough water inside the system to operate safely.

Also written as ER10 — same fault.

The Ferroli ER 10 fault code means: your boiler has stopped working because it does not have enough water inside the system to operate safely.. It appears on 1 Ferroli model in our database.

Technical description: WATER PESSURE TOO LOW - Plumbing system empty, Expansion tank defective

Typical repair cost £80-150 (including labour)

DIY fix possible

Locate the filling loop (a silver flexi-hose) underneath the boiler.Open the valves on the filling loop to allow cold mains water into the system.Watch the pressure gauge on the front of the boiler until the needle reaches the green zone (usually 1.5 bar).Close the valves tightly and ensure the boiler resets.

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Ferroli models that show the ER 10 fault code

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

Xignal Repair: £80-150

Source

Ferroli ER 10 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