Sub-Zero Electronic Control Panel Non-Responsive

Core Issue:

  • Keys on electronic control panel not working
  • 400, 600, 700, 648PRO, IC, or Undercounter Series control board not responding to commands
  • Pressing keys on the user interface has no effect
  • Control buttons do not work
  • Ice maker, filters, or door ajar alarm will not turn on or off
  • Why do I have to press a keypad multiple times for it to work?

Steps to Verify Issue:

  1. Verify that the zone is not disabled, see Double Dashes (--) Displayed on Control Panel.
  2. If lights are out in the unit, the control may appear non-responsive as the display panel is backlit. See Refrigerator or Freezer Light Switch Informaiton.
  3. Verify the unit is not in Sabbath mode. See Sub-Zero Sabbath Mode and Star K Information.
  4. For Built-In Series units, refer to Built-In (BI) Series Electronic Control Panel Non-Responsive for additional information.
  5. For drawer units with a separate control for the drawer section, ensure the wiring harness (communication cable) is securely plugged in the back of cabinet behind the drawer.
  6. Verify power is supplied to the unit.
  7. Reset the unit's power supply at the circuit breaker for 30 seconds and retest.
  8. If accessible, test the electrical outlet that the unit is plugged into.
  9. Ensure the unit is not connected to a tripped GFCI.

Refer to the product installation guide for further installation information and the product use and care guide for further use and care information


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

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