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Sub-Zero Runs Too Much


  • Refrigerator, freezer, wine storage unit uses too much electricity
  • Sub-Zero runs all the time and temperatures are normal
  • Does a refrigeration product work better with a lot of food in it
  • Do empty refrigerators or freezers affect performance
  • Too much food in a refrigerator, unit is warm


  1. Verify the condenser is clean.
  2. Review compressor run time and condenser fan run time for model specific information.
  3. Verify an average amount of food is stored in the product.
    • Too much food can prevent proper air flow and cause the unit to run more that normal.
    • Too much food can cause poor temperatures or defrost issues.
    • Too little or no food will cause the product to run more than normal.
    • Refrigerators and freezers work best when they are 25-75% full.
  4. If the unit is not in use but is turned on, fill with bags of ice in the freezer and bottles of water in the refrigerator to stablize temperatures and to reduce run time.
  5. See also, Sub-Zero Vacation Settings.


If these steps do not resolve the issue, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair. 


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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