What does the Ideal 9C fault code mean?

Your boiler's main control board has lost communication with its internal memory chip, meaning it cannot process the settings needed to run safely.

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

Typical repair cost for the Ideal 9C fault is £180-450 including labour.

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

What the manual says

Manufacturer manual

Control panel not able to detect BIM.

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 happens when the boiler's main control board loses its connection to a small plug-in memory chip called the BIM, which holds the boiler's specific identity and settings. It is usually caused by a loose connection, a failed electronic component on the circuit board, or the memory chip itself becoming faulty or corrupted. Without this vital data, the boiler cannot verify which model it is and shuts down as a safety precaution.

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 9A 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 control board has lost communication with its internal memory chip, meaning it cannot process the settings needed to run safely.

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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