Error Code 4
The freezer defrost sensor wire is loose or broken
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 4
What This Means
Sensor housing separation; Sensor contact failure; Defective wire connection; Short circuit in sensor circuit
What actually causes this:
Vibration or age caused the defrost sensor connection to fail
First Thing to Check
Look for frost buildup on the freezer walls — this indicates defrost isn't working
Parts Involved
How to Fix
- 1
1. Check sensor housing for separation
- 2
2. Check wire connections to defrost sensor
- 3
3. Measure sensor resistance
- 4
4. Replace sensor if defective
This Error Applies To
Samsung DRZ18980R Series Refrigerators (2017) (2017–present)
Related Error Codes
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