Topics:

• No lights or lights not working in the refrigerator or freezer
• Door ajar or left open and the lights turned off
• Lights turn off while product was being cleaned or loaded with food
• Lights went out or do not turn on

Troubleshooting:

If the lights are out inside a refrigeration product, use the following steps to try resolving the issue before calling for service.

Power Issues

1. Verify the unit is turned on and power is going to the product.
2. If accessible, confirm the product is plugged into the electrical outlet. For models with a grille at the top, removing or flipping the grille up may provide access to the power outlet.
3. Turn the home circuit breaker to the unit off for 30 seconds then back on again. Retest the unit operation.

Control Issues

1. If temperatures are faint on the display, the unit may be in Sabbath Mode. See Sabbath Mode Information for instructions on exiting Sabbath Mode.
2. If the door is open for a long time, the light terminator feature can turn off the lights. See Light Terminators for steps to reset.
3. If the controls do not illuminate, see Sub-Zero Control Display Is Dark for troubleshooting information.

Switch Issues

Only some models have an accessible door switch. To determine a unit model, refer to Sub-Zero Serial Tag Locations.

Designer, PRO, and Undercounter Series:

• Designer, PRO, and Undercounter Series products do not have an accessible light switch. Factory Certified Service is required to replace a light switch on these models.

Classic, 700, 600, 500, 400, and 200/300 Series:

1. Wiggle the light switch back and forth and push in and out to make sure it is not stuck.
   • In all models except 501 and 601, the light switch is mounted to the top mainframe.
   • In models 501 and 601, the switch is mounted to the bottom mainframe 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.
     
     Classic (formerly Built-In) Light Switch Location
2. For freezer sections, the light switch may be frozen. Defrost the unit if possible. See Manually Defrost a Sub-Zero for instructions.
3. If the switch is stuck, replace it. 
   • See Refrigerator or Freezer Light Switch Information for part numbers, switch locations, and replacement instructions.
   • Do not use lubricant on a stuck switch.
4. See also, Sub-Zero Light Bulbs for part information and instructions.
5. 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.
   

Additional Resources

• Broken or Hard to Remove Light Bulb
• Classic (BI) Over and Under Model Freezer Light Bulb Removal
• Classic (BI) Light Diffuser Removal and Reinstallation
• Designer Refrigeration Lighting
• UC-24 Undercounter Light Bulbs
• UC-15I Undercounter Ice Maker Light Bulb
• 648PRO Lighting
• 700 Base Units Light Bulb Removal
• 700 Series Light Bulbs
• 600 Series Light Diffuser Removal
• 500 Series Light Bulb Replacement and Light Diffuser Removal
• 590 Lower Freezer Light Bulb Removal
• 400 Series Wine Storage Light Strip Replacement
• 200 and 300 Series Light Bulb Replacement and Light Diffuser Removal
• 200 and 300 Series Drawer Light Bulb Replacement