Error Code 21C
The fridge fan motor isn't spinning or isn't being detected
Moderate
Address soon - your appliance may not work properly
Also displayed as: 21C
What This Means
Fan motor feedback signal line disconnected; Motor wire separation or loose connection; Defective fan motor (BLDC type); Main PBA relay or control circuit failure; Blocked fan rotor preventing rotation
What actually causes this:
The fridge fan is frozen, clogged with ice, or has a broken wire
First Thing to Check
Listen for the fridge fan running — you should hear a gentle humming sound
Parts Involved
How to Fix
- 1
1. Check feedback signal between Main PBA CN20 pins 13 and 17 while fan operates
- 2
2. Signal should have specific frequency when fan spins
- 3
3. If no signal detected, turn off power and wait 5 minutes
- 4
4. Check for blocked rotor or foreign objects in fan
- 5
5. Verify motor connector is fully inserted at CN20
- 6
6. Check DC 7-12V power supply at CN20 pins 15 and 17
- 7
7. Replace fan motor if voltage is normal but signal is absent
This Error Applies To
Samsung RF2 Series Refrigerators (2024) (2024–present)
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