LED 1: Off, LED 2: On Low

Halstead LED 1: Off, LED 2: On Fault Code

Also written as LED1OFFLED2ON — same fault.

The Halstead LED 1: Off, LED 2: On fault code means: your boiler is operating normally and performing its job of heating water as expected.. It appears on 1 Halstead 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: Burner Lit: Correct operation

DIY fix possible

No action is required as this status indicates the boiler is functioning correctly.

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Halstead models that show the LED 1: Off, LED 2: On fault code

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

Source

Halstead LED 1: Off, LED 2: On fault code information on this page is sourced and cross-checked against the official Halstead service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026