E90
Zanussi Communication Error Between Main PCB and User Interface

Zanussi dryer will not start and shows E90 or related E9x codes.

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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 communication cable, Faulty main control board, Faulty user interface board, Incorrect or corrupted configuration

How to Fix / Troubleshooting

Safety first: Disconnect from mains before accessing control boards.

  • 1. Power cycle: Unplug the dryer for at least 10 minutes to allow capacitors to discharge and the electronics to reset. Reconnect and test.
  • 2. Check connectors: Remove the top panel and inspect the wiring harness between the main PCB and the user interface board. Ensure all plugs are fully seated.
  • 3. Inspect cables: Look for pinched, cut, or burnt wires in the harness. Replace the harness if damaged.
  • 4. Board inspection: Examine both the main PCB and UI board for visible damage, corrosion, or burn marks.
  • 5. Configuration issues: Some E9x codes can indicate incorrect configuration after board replacement. This requires service mode access and should be done by a Zanussi technician.
  • 6. Replace faulty board: If wiring is sound and E90 persists, either the main PCB or UI board is likely defective and should be replaced with genuine parts.
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Repair Difficulty

Professional Required 5/5

Required Part

Main Control Board
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