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Winterizing Sub-Zero Products


  • How to ready a Sub-Zero when home is not heated during winter
  • What to do with products in outdoor kitchens in areas with below freezing winters
  • Should products be moved indoors, or can they be left outside with proper preparation?
  • Can a product be stored outside?


A Sub-Zero in a vacated home or one that is not heated should be winterized. Outdoor units can be left installed outdoors as long as winterization procedures have been followed.

  • Except for outdoor models, Sub-Zeros are designed to run in a 60°F to 90°F (15°C to 32°C) environment.

To winterize indoor and outdoor Sub-Zero Refrigerator, Freezer, or Wine Storage products:

  1. Turn the unit off.
    • Nothing specific needs to be done to the dispenser.
    • Indoor product mechanical and electrical components are not rated to withstand cold temperatures, even when the unit is off.
  2. Leave doors open long enough for the unit to warm to ambient temperature.
    • Adding baking soda or other drying agents may help, but make sure to completely wipe-down after the unit warms to ambient temperature.
  3. Thoroughly wipe down and dry the inside of the unit.
  4. Close (and if there is a lock, also lock) the doors.
    • Doors may also be left open. No damage will occur to the hinges.
  5. For units with an ice maker or stand-alone ice makers, the water line leading from the water valve to the ice maker must be disconnected, drained, and then reconnected. This removes most water remaining in the line, so damage from freezing should not occur.
  6. If unit is left on, turning off the water and draining the water line is not enough, as that may not drain all the water from the unit and it could freeze, causing damage.
  7. Do not use antifreeze to winterize the ice maker or water line.
  8. Install a new water filter (if applicable) when the unit is placed back in service.

200, 300, 500, 600, and 700 Series made before 2005

  • The disconnect point should be the side opposite of the garden fitting side (inlet).
  • This will drain the water trapped in the line between the valve and the fill tube.
  • Not draining can result in damage to the line and possible water flooding.
  • Note: Water valve locations may be difficult to access.

Newer 600-3 and Classic Series (BI), UC 24, UC15I, and 315I

Refer to the product Use and Care Guide for further information.


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