LED 1 ON (RESET) High

Halstead LED 1 ON (RESET) Fault Code

Also written as LED1ONRESET — same fault.

The Halstead LED 1 ON (RESET) fault code means: your boiler has stopped working as a safety precaution and needs to be manually restarted to see if it can clear the internal error.. It appears on 1 Halstead model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Non - Volatile Lockout (Reset O/H or in 'standby' mode)
Typical repair cost £120-250 (including labour)

DIY fix possible

Locate the Reset button on the front control panel.Press and hold the Reset button for 3 to 5 seconds.Wait to see if the boiler ignites and the LED light stops flashing.

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Halstead models that show the LED 1 ON (RESET) fault code

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

Source

Halstead LED 1 ON (RESET) 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