How much does it cost to fix Myson error code LED 3?

Typical repair cost for the Myson LED 3 fault is £150-300 including labour.

LED 3 Medium

Myson LED 3 Fault Code

Q: What does the Myson LED 3 fault code mean?

Your boiler is signalling that it is asking the internal air extraction motor to speed up to prepare for ignition.

Also written as LED3 — same fault.

The Myson LED 3 fault code means: your boiler is signalling that it is asking the internal air extraction motor to speed up to prepare for ignition.. It appears on 6 Myson models in our database.

Technical description: On when there is a demand for the fan at high speed.

Typical repair cost £150-300 (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 3 fault code

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

Midas 100 Repair: £150-300
Midas 80 Repair: £150-300
Stratton 100 Repair: £150-300
Stratton 80 Repair: £150-300
System 50 Repair: £150-300
System 80 Repair: £150-300

Source

Myson LED 3 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