LED 1 Low

Myson LED 1 Fault Code

Also written as LED1 — same fault.

The Myson LED 1 fault code means: your boiler is currently checking that there is enough airflow for it to start up safely; this light should turn off automatically once the system is ready to fire.. It appears on 6 Myson models 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: Will remain on until the fan has produced enough air for complete combustion at low rate - low rate air detector.
Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Myson models that show the LED 1 fault code

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

Source

Myson LED 1 fault code information on this page is sourced and cross-checked against the official Myson service / installation manuals for each affected model.

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