What does the Ideal 30 fault code mean?

Your boiler has detected an issue with the electrical power supply to the unit while it was running.

How much does it cost to fix Ideal error code 30?

Typical repair cost for the Ideal 30 fault is £100-250 including labour.

Can I fix Ideal fault code 30 myself?

Check if other appliances in your home have power.

Ideal 30 Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

Maximum difference between T1 and T2 exceeded

Shared across the Maximiser SE 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.

What causes this fault?

This fault occurs when the boiler detects an unstable electrical signal or a sudden drop in voltage while it is firing. It is usually caused by a loose connection in the internal wiring, a failing control board, or an issue with the electrical circuit providing power to the unit.

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.

Find a Gas Safe engineer

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Boiler cover options

Avoid the next call-out bill

A cover plan would handle faults like 30: no call-out fees, no surprise bills.

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All 118 fault codes on the Maximiser SE

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

-. / A -. / H -. / Y -. H =. / H =. H 0 / A 0 / H 0 / Y 0 or -. / H 0A 0H 0L 0U 0Y 001 01 1 / C 1C 2 / C 2 / F 2 / P 2 / U 2C 2F 2P 2U 03 004 4 / A 4 / C 4 / F 4 / L 4 / P 4 / U 4 / Y 4A 4C 4F 4L 4P 4U 4Y 005 05 5 / A 5 / Y 5A 5Y 6 / A 6 / C 6 / H 6 / L 6A 6C 6H 6L 7 / A 7A 7C 7F 7H 7L 008 8L 9A 9C 9F 9H 9L 9P 9U 010 10 011 12 13 14 15 016 16 017 17 18 018 19 20 21 23 24 25 26 27 28 29 029 31 32 34 35 36 37 38 39 40 41 041 42 43 60 EA EC EF EH EL EP No display

Your boiler has detected an issue with the electrical power supply to the unit while it was running.

What the manual says

What causes this fault?

Engineer required

Avoid the next call-out bill

All 118 fault codes on the Maximiser SE

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