E90
Hansa
Control Module Communication / Configuration Fault
Washer shows E90; general communication or configuration error.
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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
Corrupted EEPROM settings, Poor connection between display board and main board, Power surge damage, Wrong control board variant installed
How to Fix / Troubleshooting
Safety first: Unplug the washer before accessing control electronics.
- Power reset: Leave the washer unplugged for at least 5–10 minutes, then reconnect and try again. Sometimes this clears transient E90 errors.
- Check board connections: Remove the top panel and inspect the ribbon cable and connectors between the user interface (display) and main control module. Reseat all connectors.
- Inspect for damage: Look for burn marks, corrosion, or water ingress on both boards. If present, the affected board must be replaced.
- Configuration: If a control board was recently replaced, ensure it is the correct Hansa part number and properly configured for your model. This usually requires service tools and should be done by a technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Module
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