What does the Ideal 9A fault code mean?

Your boiler's main internal computer has developed a fault and is no longer communicating correctly with the rest of the system.

How much does it cost to fix Ideal error code 9A?

Typical repair cost for the Ideal 9A fault is £250-£450 including labour.

Ideal 9A Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

Defective control panel.

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's central control board suffers an internal electronic failure, preventing it from sending commands to the burner or pump. It is usually caused by aging components on the circuit board or a sudden electrical surge that damages the sensitive microprocessors. In some cases, loose wiring connections between the interface and the main board can also trigger this error.

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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Boiler cover options

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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 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 30 31 32 34 35 36 37 38 39 40 41 041 42 43 60 EA EC EF EH EL EP No display

Your boiler's main internal computer has developed a fault and is no longer communicating correctly with the rest of the system.

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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