LED5 on Low

Ferroli LED5 on Fault Code

Also written as LED5ON — same fault.

The Ferroli LED5 on fault code means: your boiler is receiving electrical power and is currently sitting in standby mode or operating normally.. It appears on 1 Ferroli model 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 (Permanent light)
Typical repair cost £0-80 (including labour)

DIY fix possible

Check if the room thermostat or timer is calling for heatEnsure the boiler control knob is turned to the 'ON' or 'Winter' positionIf the LED remains on but there is no heat, try a simple reset by turning the dial to 'RESET' for 5 seconds

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Ferroli models that show the LED5 on fault code

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

Source

Ferroli LED5 on 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 7 July 2026