LED 1 Low

Ferroli LED 1 Fault Code

Also written as LED1 — same fault.

The Ferroli LED 1 fault code means: your boiler is currently switched on and operating correctly, as this light is a status indicator rather than a fault.. 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: Boiler On Indicate

DIY fix possible

No action is required as this light indicates normal operation.Ensure your thermostat is set to the desired temperature.Monitor the control panel for any other flashing lights if the boiler stops working.

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Ferroli models that show the LED 1 fault code

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

Source

Ferroli LED 1 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