Thermomix User Interface Contact Failure

Buttons or touchscreen areas do not respond, or respond intermittently, without an error code.

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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

Grease or residue on touchscreen, Loose or oxidized ribbon cable, Wear of mechanical buttons (on older models), Partial failure of touch controller IC

How to Fix / Troubleshooting

Safety first: Unplug the Thermomix before cleaning the control panel.

  • Clean surface: Gently clean the touchscreen or buttons with a soft cloth slightly dampened with mild soapy water. Do not allow liquid to run into gaps.
  • Dry thoroughly: Ensure the panel is completely dry before reconnecting power.
  • Restart the unit: Power off for a few minutes, then power on and test the controls again.
  • Advanced check: If comfortable, open the housing and reseat the ribbon cable between the UI module and main PCB.
  • Service if unresolved: Persistent non-responsiveness indicates a failing UI module or main board, which should be replaced by a technician.
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Repair Difficulty

Medium 3/5

Required Part

Touchscreen / Control Panel Module
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