5 (Permanent Light) Low

Ferroli 5 (Permanent Light) Fault Code

Also written as 5PERMANENTLIGHT — same fault.

The Ferroli 5 (Permanent Light) fault code means: your boiler is correctly receiving electrical power and is currently in its standard standby or operating mode.. It appears on 9 Ferroli models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Electric power supply ON

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 Light) fault code

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

Source

Ferroli 5 (Permanent Light) 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