5 (Permanent) High

Ferroli 5 (Permanent) Fault Code

Also written as 5PERMANENT — same fault.

The Ferroli 5 (Permanent) fault code means: your boiler has detected an internal electrical supply error or a fault within the main control board that requires a professional reset.. It appears on 4 Ferroli models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Electric power supply ON
Typical repair cost £180-350 (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 5 (Permanent) fault code

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

Source

Ferroli 5 (Permanent) 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