Lo
Severin
Low Temperature / Sensor Under-Range Fault
Display shows "Lo" or a very low temperature warning; freezer may run less frequently or cycle oddly.
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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
Cabinet sensor reading below expected range, Sensor shorted, Control board miscalibration, Freezer set too cold for ambient conditions
How to Fix / Troubleshooting
Safety first: Disconnect mains power before testing sensors.
- 1. Verify actual temperature: Use an independent thermometer to check the interior temperature. If it is normal but "Lo" is displayed, suspect a sensor or control issue.
- 2. Adjust setpoint: Increase the set temperature slightly (e.g., from -24°C to -18°C) and observe if the display changes. If not, proceed.
- 3. Test cabinet NTC: Measure the resistance of the cabinet temperature sensor. A shorted sensor will show very low resistance and cause a "Lo" reading. Replace if faulty.
- 4. Inspect wiring and PCB: Check for shorts in the sensor wiring and at the control board connector.
- 5. Replace control board if needed: If the sensor and wiring are good, the ADC or calibration in the control board may be defective; replace the PCB.
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Repair Difficulty
Medium
3/5
Required Part
Cabinet NTC Temperature Sensor
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