E18
Candy User Interface / Main PCB Communication Error

Machine will not start or stops with E18; often linked to communication between display board and main board.

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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 harness between display and main PCB, Faulty display (UI) board, Faulty main control board, Oxidized connectors

How to Fix / Troubleshooting

Safety first: Unplug the appliance before removing the control panel.

Step-by-step checks:

  • Access control panel: Remove the screws securing the front control fascia and gently pull it forward to access the display board and wiring.
  • Check ribbon cable: Inspect the ribbon or harness connecting the UI to the main PCB. Ensure it is fully seated at both ends and not damaged.
  • Clean connectors: If there is visible oxidation, gently clean contacts with electrical contact cleaner and allow to dry.
  • Visual inspection: Look for cracks in the UI board, burnt components, or moisture damage.
  • Reassemble and test: Refit the panel and test operation.

When to call a technician: If reseating and inspection do not resolve E18, either the UI or main PCB may need replacement and should be diagnosed by a professional.

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Repair Difficulty

Hard 4/5

Required Part

User Interface Board
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