F3
Midea
Humidity / Steam Sensor Fault (Sensor Cooking Models)
Microwave shows F3; may shut down or refuse to start.
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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.
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Possible Causes
Failed humidity sensor, Sensor lens blocked by grease or residue, Damaged sensor wiring, Faulty sensor circuit on control board
How to Fix / Troubleshooting
Safety first: Unplug the microwave before cleaning or accessing internal components.
Step-by-step checks:
- 1. Clean sensor area: On sensor-cooking Midea models, the humidity sensor is usually located on the top or side of the cavity behind a small grille or cover. Clean this area thoroughly with a mild detergent and soft cloth to remove grease and residue.
- 2. Test operation: After cleaning, allow the cavity to dry completely, then plug in and test a sensor cook function. If F3 returns, further checks are needed.
- 3. Access sensor (experienced DIYers): Remove the outer cabinet and locate the humidity sensor module. Inspect the wiring harness and connector for damage or looseness.
- 4. Replace sensor: If wiring is intact, replace the humidity sensor with an OEM Midea part.
- 5. Control board check: If a new sensor does not resolve F3, the control board sensor circuit may be defective and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Humidity / Steam Sensor for Midea Microwave
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