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Sub-Zero Model with Erratic Temperatures on Refrigeration Display


  • Temperatures are continuously changing on display
  • Unit temperature is repeatedly raising or dropping
  • Sub-Zero temperature is not staying the same
  • Temperature is constantly going up and down on refrigerator, wine, or freezer control panel


  • Airflow or food storage
  • Door or drawer ajar
  • Thermistor or thermostat
  • Control board
  • Sealed system


Slight temperature fluctuations may be normal. Refer to Sub-Zero Temperature Fluctuations for more information.

  1. Make sure that the Sub-Zero is connected to a dedicated electrical supply.
    • Reset power at electrical supply source; allow 24 hours for temperatures to stabilize.
  2. Make sure condenser is clean.
  3. If unit is overloaded with food items or was recently loaded with food items, it may take up to 24 hours for temperatures to stabilize.
    • Rearrange food items if necessary.
  4. Repeatedly opening unit door or drawer may cause temperatures to fluctuate.
    • Leave door or drawer closed for temperatures to stabilize.
  5. Leaving door or drawer open for an extended period of time will cause temperatures to rise.
    • Close door or drawer for temperatures to stabilize.
    • Depending on model, shown temperature may raise 1°F for every minute that door or drawer is open; this is considered normal.
  6. If these troubleshooting steps do not resolve the issue, service is necessary to expertly diagnose and repair the product. Contact Factory Certified Service to schedule an appointment for repair.

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Need further assistance? Contact Customer Care at 800.222.7820 or provide your information below and request a Customer Care representative contact you.

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