i90
Ikea Communication Error Between User Interface and Main Control Board

Dishwasher displays i90 and will not run a program.

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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

Loose or damaged wiring harness between UI and main PCB, Faulty user interface board, Faulty main control board

How to Fix / Troubleshooting

Safety first: Turn off power at the breaker before accessing the control panel.

  • Check door console: Remove the inner door panel to access the user interface (UI) board. Inspect the ribbon cable and connectors for damage or corrosion.
  • Reseat connectors: Carefully unplug and replug the connectors between the UI and main control board to ensure good contact.
  • Inspect for moisture: Look for signs of water ingress around the control panel that could short the electronics.

If wiring and connectors are intact, either the user interface board or the main control board is defective. Determining which requires professional diagnostic tools; contact a technician.

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Repair Difficulty

Professional Required 5/5

Required Part

User Interface Control Board
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