Low
I3 on Ideal Mexico Super 100FF / 125FF

Your boiler is receiving power correctly, but the system has not detected a fault or specific issue at this moment.

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.

From this model's manual
Verified against the Ideal Mexico Super 100ff 125ff System 3 installation & service manual, page 31.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

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

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Avoid the next call-out bill

A cover plan would handle faults like I3: no call-out fees, no surprise bills.

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