Low
Neon I3 on Ideal Mexico Super

This is a normal status indicator showing that your boiler is receiving power and is ready to operate.

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

Mains electricity ON

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 as this indicates the power is switched onIf the boiler is not heating, check that your thermostat or programmer is calling for heatEnsure the gas supply is turned on

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All 3 fault codes on the Mexico Super

Seeing a different code? Every code this model can display, in one place.

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