What does the Ideal I3 fault code mean?

Your boiler is not receiving any electrical power, which is why the lights are off and it isn't working.

How much does it cost to fix Ideal error code I3?

Typical repair cost for the Ideal I3 fault is £60-120 including labour.

Can I fix Ideal fault code I3 myself?

Check if your home's main consumer unit (fuse box) has tripped.

Ideal I3 Fault Code: What It Means & How to Fix It

Technical description

Mains On neon - if not illuminated check mains supply, fuses, and input wiring

What causes this fault?

This fault occurs when the boiler's control system detects a complete break in the electrical circuit required to run the unit. The most common reason is a blown fuse or a loose connection in the wiring, which prevents electricity from reaching the internal components. In some cases, a surge may have damaged the main circuit board, causing it to fail entirely.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Your boiler is not receiving any electrical power, which is why the lights are off and it isn't working.

Technical description

What causes this fault?

Engineer required

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