Error Code 21
The freezer fan motor isn't spinning properly
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 21
What This Means
Feed back signal wire contact failure; Unplugged motor wire harness; Defective fan motor; Fan obstruction preventing rotation
What actually causes this:
Ice buildup or debris is blocking the freezer fan, or the motor burned out
First Thing to Check
Look inside the freezer vents — there may be ice or frost blocking the fan
Parts Involved
How to Fix
- 1
1. Check fan motor wire connections
- 2
2. Verify fan blade spins freely without obstruction
- 3
3. Measure motor resistance (disconnect first)
- 4
4. Check voltage at fan motor connector during operation — normal: 120V
- 5
5. Replace fan motor if defective
This Error Applies To
Samsung DRZ18980R Series Refrigerators (2017) (2017–present)
Related Error Codes
The fridge temperature sensor isn't responding correctly
The fridge defrost sensor wire is loose or broken
The humidity sensor in the fresh zone isn't working
The condenser fan motor isn't working
The freezer temperature sensor isn't responding correctly
The room temperature sensor isn't working
The cocktail ice maker temperature sensor isn't responding
The freezer defrost heater isn't working properly