Microwave display shows F1E0 and unit will not start or cancels shortly after pressing Start.

Safety First: Unplug the microwave or switch off the dedicated circuit breaker before removing any panels. Microwaves can store high voltage even when unplugged; do not touch the high-voltage section (capacitor, transformer, magnetron). If you are not experienced, contact a qualified technician.

Step-by-step checks:

• Power reset: Disconnect power for 5–10 minutes to allow the control to fully discharge. Restore power and check if F1E0 returns.
• Inspect control panel connections: Remove the upper grille and control panel (usually a few screws). Verify the ribbon cable from the user interface to the main control board is fully seated and not damaged or corroded.
• Check for moisture/grease: Look for signs of moisture or grease on the control board and connectors. If present, carefully clean around connectors with a dry, lint-free cloth (do not use liquids).
• Visual inspection of control board: With power still disconnected, inspect the electronic control board for burnt spots, bulging components, or cracked solder joints.
• If code persists: If F1E0 reappears after reseating connectors and power reset, the main control board is likely defective and should be replaced with the correct KitchenAid part number for your model.

When to stop: If you must remove the outer cabinet or are near the high-voltage section, stop and have a professional complete the repair.