E9
Bomann Control Board Communication / Internal Error

Bomann ice maker shows E9, unit may power on but no functions start.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Defective main control PCB, Corrupted firmware, Loose harness between display board and main board, Shorted component on PCB

How to Fix / Troubleshooting

Safety first: Disconnect the appliance from mains before opening any covers.

Basic reset:

  • Unplug the unit for at least 15 minutes to fully discharge the control electronics.
  • Plug back in and attempt to start a cycle. If E9 appears immediately, the fault is likely on the control board.

Visual inspection (for technicians or experienced DIYers):

  • Remove the rear or bottom cover to access the control PCB (if accessible without damaging seals).
  • Check for burnt components, bulging capacitors, or loose connectors. Reseat all harness plugs firmly.

Important: If you are not experienced with electronics, do not attempt board-level repairs. In most cases, the entire control PCB should be replaced with the correct Bomann spare part.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Control PCB
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