F2
Antarctic Star
Lower Zone Temperature Sensor Fault (Dual-Zone Models)
Display shows F2 and the lower zone does not maintain correct temperature.
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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 lower zone thermistor, Loose or corroded connector, Damaged wiring harness to lower compartment, Faulty control board sensor channel
How to Fix / Troubleshooting
Safety: Disconnect power before servicing.
- Access lower zone sensor: Remove shelves from the lower compartment and locate the sensor on the rear or side wall, or behind a small plastic cover.
- Inspect sensor: Check for cracks, moisture, or dislodged mounting. Ensure the cable is not damaged by bottle racks.
- Test sensor: Disconnect and measure resistance. Compare to the upper zone sensor at similar temperature. Replace if open or shorted.
- Check harness at PCB: At the rear, confirm the lower zone sensor connector is properly seated on the main control PCB.
- Replace sensor: Install a new lower zone temperature sensor / thermistor if defective.
- Control board: If F2 persists with a good sensor, replace the main control PCB.
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Repair Difficulty
Medium
3/5
Required Part
Lower Zone Temperature Sensor (Thermistor)
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