Sub-Zero Temperature Inaccuracy – Sensor or Calibration Issue

Wine cooler temperature display is inaccurate; actual bottle temperature does not match the setpoint.

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Possible Causes

Aging or drifting thermistor, Sensor not in proper airflow, Control calibration drift, Warm air infiltration from door gasket leak

How to Fix / Troubleshooting

Safety first: Disconnect power before accessing sensors.

Step 1 – Verify with thermometer

  • Place a calibrated thermometer in the center of the compartment and compare to the display after 24 hours of stable operation.

Step 2 – Adjust setpoint

  • If the difference is small (2–3°F), adjust the setpoint to compensate.

Step 3 – Inspect thermistor placement

  • Ensure the thermistor is mounted as designed and not touching cold surfaces directly.
  • Replace the thermistor if readings are significantly off.

Step 4 – Check gasket

  • Repair or replace any leaking door gasket that may cause temperature swings.
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Repair Difficulty

Easy 2/5

Required Part

Compartment Thermistor
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