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Kenmore Microwave F3 Error Code — Humidity Sensor Fault

Kenmore Microwave Error Code Reference

F3

Kenmore Microwave F3 Error Code — Humidity Sensor Fault

Kenmore Microwave

Medium Severity
Warning: If your Kenmore appliance displays the F3 error code and you are unsure how to proceed, turn off the appliance and contact a qualified technician. Some errors require professional repair to avoid further damage or safety risks.

The F3 error code on a Kenmore microwave indicates a fault with the humidity (moisture) sensor. Some Kenmore microwaves use a humidity sensor to automatically determine cooking doneness. When this sensor fails, auto-cook functions may be disabled and F3 will display.

Causes

  • Failed humidity sensor
  • Grease or food film coating the sensor
  • Wiring fault to the sensor

What To Do

  1. Locate and clean the humidity sensor — typically a small protrusion on the microwave cavity interior wall.
  2. Wipe with a damp cloth and allow to dry.
  3. If F3 persists after cleaning, the sensor requires professional replacement. Manual cooking modes will still function.

Need Professional Help with Error Code F3?

Our highly trained Kenmore technicians can diagnose and fix this error code quickly — using factory-certified parts and a 30-day warranty.

Other Kenmore Microwave Error Codes

PF Kenmore Microwave PF Error Code — Power Failure F1 Kenmore Microwave F1 Error Code — Control Board Fault F2 Kenmore Microwave F2 Error Code — Shorted Keypad F4 Kenmore Microwave F4 Error Code — Cavity Temperature Sensor Fault F5 Kenmore Microwave F5 Error Code — Door Switch Fault F6 Kenmore Microwave F6 Error Code — Communication Error
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