SYMPTOM

LCD Off But Unit Still Running

Appliance: Sub-Zero 700 Series Models: 700TR, 700TC/I, 700TF/I, 700BR, 700BF/I

⚠ What This Means

The LCD display is completely dark but the unit continues to run and cool. This indicates the display cable is unhooked or faulty. The control board is functioning but cannot communicate with the display.

🔧 How to Fix

  1. Disconnect power at the master power switch.
  2. Locate the display cable connecting the control panel to the control board.
  3. Check all wires (black, white, yellow, blue, red) for loose connections.
  4. Repair or reseat any loose connections.
  5. Restore power and verify the display illuminates.

Rather Have a Pro Handle This?

Find top-rated Sub-Zero 700 Series repair technicians in your area. Licensed, insured, and reviewed by homeowners.

🔎 Find Pros on Thumbtack ⭐ Find Pros on Angi

We may earn a referral fee when you hire through our partner links.

Related Error Guides

Error Su: Blue Wire Fault

Display cable blue wire issue

Error -88: Red Wire Fault

Display cable red wire issue