Low
LED 6 on Myson System 50

Your boiler is currently going through its normal startup process to ignite the burner and get your heating or hot water working.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

On when the main board calls upon the full sequence control board to light the main burner and turn on the fan (speed selection depends on LED 3).

Shared across the range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

No action required; this is a normal operational light.Monitor the boiler for continued normal operation.If the LED remains on but the boiler fails to fire, try a reset.

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