Error Code 21C
Freezer fan motor is not working
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 21C
What This Means
Feedback signal line contact error; Motor wire separation or disconnection; Motor bearing failure; Motor speed sensor malfunction; Blocked fan
What actually causes this:
Motor connection loose or fan blocked by ice
First Thing to Check
Check if freezer fan spins freely without obstruction
Parts Involved
How to Fix
- 1
Check voltage at MAIN PCB CN75 pins 1 and 4
- 2
Verify voltage is between 7V~12V
- 3
Inspect motor wiring for damage
- 4
Check motor for physical obstruction
This Error Applies To
Samsung RF28K9070A Series Refrigerators (2018) (2018–present)
Related Error Codes
Cool Select Room defrost heater failed
Main and panel boards are not communicating
Compressor inverter is not communicating with main board
Ice duct heater not working properly
Ice bucket heater is malfunctioning
Door handle heater not working
Fridge is not cold enough
Compressor will not start