SubZero Refrigerator Freezer Error Code 23 – How to fix? by KatyApplianceRepair.com
Sub-Zero error code EC 23 indicates
a defrost overheat with wiring fault. Below is a quick reference
and troubleshooting guide for this code.
Quick Reference
| Error Code | Meaning | Severity |
|---|---|---|
| EC 23 | Defrost overheat combined with no voltage feedback — similar to EC 21 + EC 22 | Medium |
Cause & Solution
| Cause | What to Check | Fix |
|---|---|---|
| Defrost terminator not opening AND wiring fault | Test defrost terminator continuity; trace Gray/White wire | Replace terminator and repair wiring as needed |
Need help with EC 23?
Call (281) 688-6685 —
Katy Appliance Repair: same-day Sub-Zero diagnostics in Katy, TX.