How much does it cost to fix Ferroli error code ER 5?

Typical repair cost for the Ferroli ER 5 fault is £120-220 including labour.

ER 5 Emergency

Ferroli ER 5 Fault Code

Q: What does the Ferroli ER 5 fault code mean?

Your boiler is struggling to clear exhaust gases due to a blockage in the air vent pipes or a faulty safety sensor.

Also written as ER5 — same fault.

The Ferroli ER 5 fault code means: your boiler is struggling to clear exhaust gases due to a blockage in the air vent pipes or a faulty safety sensor.. It appears on 1 Ferroli model in our database.

Technical description: FAULT AIR PRESS SWITCH - Defective pressure switch or clogged tubes

Typical repair cost £120-220 (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 5 fault code

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

Xignal Repair: £120-220

Source

Ferroli ER 5 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