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
Other Error Codes for RF28K9070AA
Fridge fan motor is not operating
Cool Select fan motor is not running
I/O Expander is not responding to main board
Main and panel boards are not communicating
Compressor inverter is not communicating with main board
Fridge defrost sensor is not working
Freezer defrost sensor is not responding
Ice duct heater not working properly