Error Code 21E
Freezer fan motor failure or feedback signal issue
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 21E
What This Means
Bad feedback signaling wire contact; Motor wire slipped out; Defective fan motor; FG signal error preventing motor detection
What actually causes this:
Motor bearing seizes, wiring vibrates loose, or connector corrosion breaks signal
First Thing to Check
Measure voltage at CN74 pin 9 with power and compressor running
Parts Involved
How to Fix
- 1
Check voltage between MAIN PCB CN74 #9 and #1 should be 7V~12V DC
- 2
Verify FG (frequency generator) pulse signal from motor rotation
- 3
Check CN74 connector pins 9 for continuity
- 4
Listen for motor humming during forced operation
- 5
Replace motor if no signal after voltage confirmed
This Error Applies To
Samsung RS22HDHPN Series Refrigerators (2013) (2013–present)