Su

Display Cable Blue Wire Fault

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

⚠ What This Means

The display shows Su and the top lights are off. This indicates the blue wire of the display cable is unhooked or faulty.

🔧 How to Fix

Disconnect power at the master power switch.
Locate the display cable connecting the control panel to the control board.
Check the blue wire for loose connections, breaks, or corrosion.
Repair or reseat the blue wire connection.
Restore power and verify the display shows normal temperature readings.

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.