SubZero Refrigerator Freezer Error Code 07 – How to fix? by KatyApplianceRepair.com 

Sub-Zero error code EC 07 indicates
a freezer cabinet thermistor fault. Below is a quick reference
and troubleshooting guide for this code.

Quick Reference

Error Code	Meaning	Severity
EC 07	Thermistor fault — inconsistent temperature readings in the freezer cabinet	Medium

Cause & Solution

Cause	What to Check	Fix
Loose or faulty freezer cabinet thermistor wiring	Inspect connections between the freezer thermistor and control board	Reconnect or repair wiring; verify continuity
Defective freezer cabinet thermistor	Measure resistance — compare to specification for your model	Replace the thermistor if readings are out of range