KitchenAid Microwave Error Codes

Microwaves have become an essential appliance in many kitchens, including those made by KitchenAid, a well-known appliance manufacturer. However, like any electronic device, KitchenAid microwaves can encounter issues, and the appliance provides error codes to help diagnose and address these problems. In this guide, we will explore KitchenAid microwave error codes, what they mean, and how to troubleshoot them.

Common KitchenAid Microwave Error Codes

  1. F1 Error Code
    • Description: The F1 error code typically indicates a control board malfunction.
    • Troubleshooting:
      • Reset the microwave by unplugging it for a few minutes and then plugging it back in.
      • If the error persists, you may need to replace the control board or consult a technician.
  2. F2 Error Code
    • Description: The F2 error code often indicates a problem with the microwave’s keypad or membrane switch.
    • Troubleshooting:
      • Clean the keypad and ensure there are no obstructions or debris.
      • If cleaning doesn’t work, you may need to replace the keypad or membrane switch.
  3. F3 Error Code
    • Description: The F3 error code points to a problem with the microwave’s temperature sensor or thermostat.
    • Troubleshooting:
      • Check the temperature sensor and thermostat for damage or loose connections.
      • Replace the faulty component if necessary.
  4. F4 Error Code
    • Description: The F4 error code is usually associated with a problem in the humidity sensor circuit.
    • Troubleshooting:
      • Inspect the humidity sensor circuit and its connections for issues.
      • Replace the humidity sensor if it’s malfunctioning.
  5. F5 Error Code
    • Description: The F5 error code is linked to issues with the microwave’s power relay.
    • Troubleshooting:
      • Check the power relay for damage or loose wires.
      • If needed, replace the power relay.
  6. F6 Error Code
    • Description: The F6 error code typically indicates a problem with the microwave’s door switches.
    • Troubleshooting:
      • Examine the door switches for damage or alignment problems.
      • Replace any faulty door switches.
  7. F7 Error Code
    • Description: The F7 error code suggests a problem with the microwave’s inverter board or magnetron.
    • Troubleshooting:
      • Inspect the inverter board and magnetron for faults.
      • Replace these components if necessary.

Steps to Troubleshoot KitchenAid Microwave Error Codes


Check the Control Board Connections: Open the microwave control panel and inspect the connections on the control board. Loose or corroded connections can trigger the F1 error. Re-seat the connections and ensure they are secure.

Diagnose the Control Board: If the control board is suspected of being faulty, you can use a multimeter to test it. If it’s not sending the correct voltage signals, replacing the control board might be necessary.

For F2 Error Code:

Testing the Keypad: To verify if the keypad is causing the error, you can conduct a continuity test using a multimeter. If certain buttons don’t register or have a continuous reading when they shouldn’t, the keypad might need replacement.

Membrane Switch Replacement: If the issue is with the membrane switch beneath the keypad, you’ll need to replace the entire keypad assembly.

For F4 Error Code:

Humidity Sensor Testing: Use a multimeter to check the humidity sensor’s resistance. If the readings are out of the specified range, replace the humidity sensor.

For F5 Error Code:

Inspect the Power Relay: Thoroughly examine the power relay on the control board for signs of damage, overheating, or burned spots. If any are present, replace the relay.

For F6 Error Code:

Door Switch Adjustment: Sometimes, the door switches might just need to be re-aligned or adjusted. Ensure they are making proper contact when the door is closed.

For F7 Error Code:

Testing the Inverter Board: The inverter board can be tested with a multimeter for continuity and voltage output. If it’s not functioning correctly, it should be replaced.

Magnetron Testing: While testing the inverter board, also test the magnetron. If the magnetron isn’t receiving the correct voltage, it might need replacement.

Preventive Maintenance Tips

To avoid encountering these error codes in the first place and extend the life of your KitchenAid microwave:

  1. Regular Cleaning: Keep the interior of the microwave clean and free from spills or food debris. A dirty microwave can cause various issues.
  2. Proper Use: Follow the manufacturer’s instructions for using your microwave. Avoid using metal containers or utensils, as this can damage the appliance.
  3. Avoid Overheating: Don’t run the microwave empty or for extended periods without food, as it can overheat and damage components.
  4. Regular Inspection: Periodically inspect the door seals, switches, and other critical components for wear and tear.
  5. Surge Protection: Consider using a surge protector to safeguard your microwave from power surges, which can lead to error codes.

KitchenAid Microwave Error Codes

Error CodeDescriptionPossible CausesSolutionAdditional Notes
F1Internal Memory ErrorElectrical malfunctionReset the microwave’s circuitryIf problem persists, contact customer support
F2Magnetron FailureMagnetron malfunctionReplace the magnetronMagnetron is a high-voltage component
F3Sensor ErrorSensor malfunctionCheck sensor connections and wiringReplace sensor if necessary
F4Door Open ErrorDoor not securely closedEnsure the door is properly closedCheck door switches
F5OverheatingOverheating detectedAllow the microwave to cool downCheck ventilation and cooking times


Error CodeDescriptionPossible CausesSolutionAdditional Notes
F6Inverter ErrorInverter malfunctionCheck inverter connections and wiringReplace inverter if necessary
F7Power Supply ErrorPower supply issueCheck power source and connectionsEnsure microwave is properly plugged in
F8Touchpad ErrorTouchpad malfunctionClean and check touchpad for damageReplace touchpad if necessary
F9Control Board ErrorControl board malfunctionReset control board or replaceMay require professional service
F10Exhaust Fan ErrorExhaust fan malfunctionCheck fan connections and motorReplace fan if necessary


Error CodeDescriptionPossible CausesSolutionAdditional Notes
F11Inverter OvercurrentOvercurrent detectedCheck inverter and wiringEnsure proper voltage supply
F12Turntable ErrorTurntable malfunctionCheck turntable motor and connectionsReplace motor or turntable if necessary
F13Convection ErrorConvection malfunctionCheck convection fan and wiringReplace fan or convection components
F14Humidity Sensor ErrorSensor malfunctionCheck sensor connections and wiringReplace sensor if necessary
F15Steam Sensor ErrorSensor malfunctionCheck sensor connections and wiringReplace sensor if necessary


Error CodeDescriptionPossible CausesSolutionAdditional Notes
F16Display ErrorDisplay malfunctionReset or replace displayContact customer support if needed
F17Communication ErrorCommunication failureCheck control board connectionsEnsure proper communication between components
F18High Voltage ErrorHigh voltage detectedCheck high voltage componentsMay require professional service
F19Low Voltage ErrorLow voltage detectedCheck power source and connectionsEnsure proper voltage supply
F20Door Lock ErrorDoor lock malfunctionCheck door lock mechanismReplace lock if necessary

Error CodeDescriptionPossible CausesSolutionAdditional Notes
F21System ErrorSystem malfunctionRestart microwave or contact supportMay require professional service
F22Cooking ErrorCooking malfunctionCheck cooking settings and sensorsAdjust settings or replace sensors
F23Voltage ErrorVoltage irregularityCheck power source and connectionsEnsure stable voltage supply
F24Time ErrorTiming issueCheck timer settings and control boardAdjust settings or replace control board
F25Inverter OvervoltageOvervoltage detectedCheck inverter and wiringEnsure proper voltage supply


Remember that safety should be a top priority when working with any electrical appliance. If you’re not comfortable or experienced with diagnosing and repairing microwave issues, it’s always best to seek the assistance of a qualified technician or KitchenAid’s customer support. Attempting advanced troubleshooting without the necessary skills can lead to further damage or safety hazards.


KitchenAid Microwave Error Codes

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