F12
Panasonic
Freezer Door Switch / Reed Sensor Error
Freezer door alarm with F12 code, beeping even when door appears closed
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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 freezer door switch or reed sensor, Magnet in door gasket missing or displaced, Broken harness in door hinge area, Control PCB input fault
How to Fix / Troubleshooting
Safety: Unplug the refrigerator before accessing door switch or sensor wiring.
- Step 1 – Inspect gasket magnet: Some Panasonic models use a magnet in the door gasket to trigger a reed sensor. Check that the gasket is intact and not torn or deformed.
- Step 2 – Locate sensor: The reed sensor is usually embedded in the cabinet frame. Check for loose or damaged trim around it.
- Step 3 – Harness check: Inspect the wire bundle at the top or bottom hinge for signs of flex damage. Repair or replace if wires are broken.
- Step 4 – Replace sensor/switch: If the sensor tests faulty with a multimeter, replace it with the correct Panasonic part.
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Repair Difficulty
Medium
3/5
Required Part
Freezer Door Sensor / Switch
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