F1
Antarctic Star
Upper Zone Temperature Sensor Fault (Dual-Zone Models)
Display shows F1 and the unit does not respond properly to temperature changes.
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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 upper zone thermistor, Loose sensor connector on control board, Damaged wiring harness to upper compartment, Faulty control board sensor channel
How to Fix / Troubleshooting
Safety: Unplug the dual-zone wine cooler before removing interior panels.
- Access upper zone sensor: Remove shelves from the upper compartment. Look for a small sensor probe on the rear or side wall, or behind a small cover.
- Inspect sensor and wiring: Check for physical damage, moisture intrusion, or loose mounting. Ensure the sensor cable is not pinched by shelves.
- Test resistance: Disconnect the sensor and measure resistance at room temperature. Compare to the lower zone sensor if accessible; values should be similar.
- Reconnect at control board: At the rear, access the main control PCB and verify the upper zone sensor connector is fully seated.
- Replace sensor: If readings are out of range, install a new upper zone temperature sensor / thermistor for your Antarctic Star model.
- Control board replacement: If a new sensor does not resolve F1, the main control PCB may have a defective sensor channel.
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Repair Difficulty
Medium
3/5
Required Part
Upper Zone Temperature Sensor (Thermistor)
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