SubZero Refrigerator Freezer Error Code 50 – How to fix? by KatyApplianceRepair.com 

Sub-Zero error code EC 50 indicates
excessive refrigerator compressor run time. Below is a quick reference
and troubleshooting guide for this code.

Quick Reference

Error Code	Meaning	Severity
EC 50	Excessive refrigerator compressor run — refrigerator not reaching set temperature efficiently	Medium

Cause & Solution

Cause	What to Check	Fix
Dirty condenser restricting airflow	Inspect and clean the condenser coils	Vacuum or brush the condenser; ensure proper ventilation around the unit
Sealed-system issue (low refrigerant or compressor wear)	Monitor compressor run time after cleaning condenser	If error returns, schedule professional sealed-system diagnostics