KitchenAid Microwave Error Codes

Complete Troubleshooting & Repair Guide

Control Panel Errors
F1
Touch Panel Shorted
  • Disconnect power for 5–10 minutes.
  • Clean control panel surface from moisture or grease.
  • Inspect ribbon cable connection.
  • Replace touch panel if short persists.
Temperature & Sensor Errors
F2
Overheating Detected
  • Allow microwave to cool completely.
  • Check ventilation openings for blockage.
  • Inspect thermal sensor or thermostat.
  • Replace thermal cutoff if needed.
F3
Humidity Sensor Failure
  • Inspect sensor wiring connections.
  • Check for moisture or corrosion damage.
  • Test sensor resistance with multimeter.
  • Replace humidity sensor if faulty.
Door & Safety System Errors
F4
Door Switch Issue
  • Check door alignment and latch.
  • Inspect interlock switches for damage.
  • Test continuity of door switch system.
  • Replace switch assembly if needed.
Power & Cooking System Errors
F5
Relay Failure
  • Reset microwave power supply.
  • Inspect control board relay circuit.
  • Check wiring to high-voltage components.
  • Replace control board if relay is faulty.
Important: Microwave repairs involve high voltage components. If the issue persists, contact a certified KitchenAid technician.