Sub-Zero Interior Lights Turned Off


  • The lights are not working in the refrigerator and/or freezer
  • The door was ajar or left open and the lights turned off
  • Why did the lights turn off when the unit was being cleaned or loaded with food?
  • Lights went out or do not turn on

Steps to Verify Issue:

If the lights are out inside a refrigeration product:

  1. Verify the unit is turned on and power is going to the product.
  2. If accessible, confirm the unit is plugged into the electrical outlet.
  3. Turn the home circuit breaker to the unit off for 10 seconds then back on again. Retest the unit operation.
  4. If the temperatures appear faint on the digital display, the unit may be in Sabbath Mode. See Sabbath Mode Information.
  5. If the door was left open for an extended period of time, the light terminator feature can turn on and turn off the lights. See Light Terminators for more information, including steps to reset.
  6. If possible, test light bulbs in another light fixture like a lamp. If light bulbs are needed, refer to:
  7. For Classic Refrigeration (BI), 600, 500 Series products, wiggle the light switch back and forth, push in and out to release to make sure it is not stuck in the closed position.
    • The light switch is mounted to the top mainframe (excluding models 501 and 601).
      • The switch mounted to the bottom mainframe of models 501 and 601, above the unit grille.
    • Classic Refrigeration single door models have one switch, two door models have two switches.
    • If there are two switches, the light switch is the left-most switch. Do not use lubricant on a stuck switch.
    • If the switch is sticking without resolve, it must be replaced.

    • Classic (formerly Built-In) Light Switch Location
  8. For freezer sections, the light switch may be frozen. Defrost the unit if possible. Refer to Manually Defrost a Sub-Zero for instructions.
  9. If lights still do not function, the light switch likely needs replacement. Refer to Refrigerator or Freezer Light Switch Information for part numbers, switch locations, and replacement instructions.
    • A refrigerator light switch in any Classic Refrigerator, 600, 500, 200/300 Series product or a freezer lights switch in a side-by-side unit is an easy replacement that does not require a service technician.
    • Replacing a freezer light switch in an over-and-under unit is more involved and must be completed by a service technician.
    • Designer Refrigeration light switch issues require a Factory Certified Service technician to repair.
    • 700 Series models prior to serial # 1648879 have a magnetic switch and a light transformer in the upper panel. Factory Certified Service must replace these switches.
  10. If the lights still do not work after completing the steps above, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.

See also:

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