SubZero Refrigerator Freezer Error Code 38 – How to fix? by KatyApplianceRepair.com 

Sub-Zero error code EC 38 indicates
multiple excessive compressor run times or a thermistor fault. Below is a quick reference
and troubleshooting guide for this code.

Quick Reference

Error Code	Meaning	Severity
EC 38	Multiple excessive compressor run times or evaporator thermistor fault	High

Cause & Solution

Cause	What to Check	Fix
Evaporator thermistor fault triggering extended compressor runs	Test evaporator thermistor resistance	Replace the thermistor if out of specification
Compressor running excessively due to sealed-system issue	Clean the condenser; verify condenser fan operation	If error persists after cleaning, schedule sealed-system diagnostics