SubZero Refrigerator Freezer Error Code 11 – How to fix? by KatyApplianceRepair.com 

Sub-Zero error code EC 11 indicates
an upper cabinet door-open warning. Below is a quick reference
and troubleshooting guide for this code.

Quick Reference

Error Code	Meaning	Severity
EC 11	Upper cabinet door has been open too long — temperature rising	Low

Cause & Solution

Cause	What to Check	Fix
Upper cabinet door left ajar	Inspect door seal and hinge alignment	Close the door firmly; check the gasket for damage
Faulty door switch	Test the door switch with a multimeter	Replace the door switch if it does not register properly