E18
Gaggenau Communication error between main control and user interface

Dryer shows E18 and may not respond to controls; display may be frozen.

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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 user interface PCB, Faulty main control PCB, Electrical noise interference

How to Fix / Troubleshooting

Safety first: Unplug the dryer before accessing electronics.

  • Power cycle: Disconnect power for 10 minutes, then reconnect and test.
  • Inspect communication cable: Remove the top panel and locate the ribbon or harness between the UI and main board. Ensure it is fully seated at both ends and not damaged.
  • Check for pin damage: Look for bent pins in the connectors. Carefully straighten if necessary.
  • Isolate interference: Ensure no high-power devices share the same outlet or circuit that could introduce electrical noise.
  • Board substitution: If cabling is intact, replace the user interface board first. If E18 persists, replace the main control board.
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Repair Difficulty

Hard 4/5

Required Part

Communication Harness
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