F18
Miele Keypad / User Interface Fault

Robot vacuum shows F18 and may not respond to buttons or remote commands reliably.

Advertisements

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.

Advertisements

Possible Causes

Stuck or damaged buttons, Moisture ingress into keypad, Faulty UI board, Loose ribbon cable between UI and main PCB

How to Fix / Troubleshooting

Safety first: Turn the robot OFF before cleaning the control panel.

Steps:

  • 1. Inspect buttons: Check for physically stuck or jammed buttons. Press each button several times to see if it returns freely.
  • 2. Clean surface: Wipe the control panel with a slightly damp cloth (water only), then dry thoroughly. Do not allow liquid to seep into gaps.
  • 3. Dry out moisture: If the robot was recently exposed to liquid spills, power it off and let it dry in a warm, dry room for 24 hours before retrying.

When to call a technician: If F18 persists and buttons remain unresponsive or trigger randomly, the UI board or its connection to the main PCB may be defective. Professional service is required.

Advertisements

Repair Difficulty

Medium 3/5

Required Part

User Interface / Keypad Board
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements