SubZero Refrigerator Freezer Error Code 10 – How to fix? by KatyApplianceRepair.com 

Sub-Zero error code EC 10 indicates
a refrigerator temperature warning. Below is a quick reference
and troubleshooting guide for this code.

Quick Reference

Error Code	Meaning	Severity
EC 10	Refrigerator too warm — possible door left open or temperature rising	Low

Cause & Solution

Cause	What to Check	Fix
Door left open too long	Verify door seal and closing mechanism	Close the door; allow temperature to stabilize
Temperature rising above set point	Check for blocked vents, overloaded compartment, or warm food just loaded	Power cycle the unit; if error persists, schedule service