Low
5 (Permanent Light) on Ferroli F24b

Your boiler is operating normally and is receiving mains electricity, so no action is required.

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.

What the manual says

Manufacturer manual

Electric power supply ON

From this model's manual
Verified against the Bm Ferroli F24b Installation Servicing Instructions Manual installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

No action is required as this is a status indicator and not a fault code.

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Avoid the next call-out bill

A cover plan would handle faults like 5 (Permanent Light): no call-out fees, no surprise bills.

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