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648PRO Manual Zone Disable


  • Turn off one section of 648PRO
  • Turn off the refrigerator or freezer only in a 648PRO


Model 648PRO allows for disabling the upper refrigerator, lower refrigerator, and freezer all separately.

  • Always check setpoints after restoring normal function.
  • It is normal for zone 2 to be missing.
  • Manual Zone Disable Mode allows the user to switch one zone, or compartment OFF for interior cleaning, defrosting, or diagnostic purposes, while allowing the other zones to continue cooling.

To initiate Manual Zone Disable Mode:

(Glass door model control panel):

  1. With the unit ON, press and hold the WARMER key for the zone being disabled.
  2. While holding the WARMER key, press the POWER key and release both keys.
  3. Double dashes will appear on the user display in place of zone temperatures, indicating all cooling functions for that zone are disabled.
  4. Open the door to speed the defrost process if desired.
  5. Repeat procedure to restore normal function.

Normal function can also be restored by touching the unit OFF, then back ON.

For information about other models, refer to Turn Off One Section of a Sub-Zero Refrigerator.

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


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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