F4
Midea
Weight / Load Sensor Fault (Built-in Scale Models)
Microwave shows F4; may not start or may stop during sensor cooking.
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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
Defective weight sensor (load cell), Loose or damaged sensor wiring, Miscalibrated sensor, Faulty sensor input on control board
How to Fix / Troubleshooting
Safety first: Unplug the microwave before any internal inspection.
Step-by-step checks:
- 1. Check for model features: Only some advanced Midea microwaves have weight sensors. Confirm your model supports this feature.
- 2. Reset and recalibrate: Consult the user manual for any weight sensor calibration procedure. Perform the calibration if available.
- 3. Inspect sensor (technician-level): The weight sensor is typically located under the cavity floor or turntable support. Inspect for physical damage and secure mounting.
- 4. Check wiring: Ensure the sensor harness is intact and firmly connected to the control board.
- 5. Replace sensor or board: If F4 persists, replace the weight sensor. If still unresolved, the control board may need replacement.
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Repair Difficulty
Hard
4/5
Required Part
Weight Sensor / Load Cell for Midea Microwave
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