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Samsung Refrigerators2021–present

Error Code 21

Freezer cooling fan is not working

Moderate

Address soon - your appliance may not work properly

Also displayed as: 21 (Freezer LED blinks)

What This Means

Freezer fan motor failure; Fan blade obstructed by ice or foreign material; Bad wiring connection to fan motor; MAIN PCB relay or control circuit defect

What actually causes this:

Fan motor is broken or stuck

First Thing to Check

Make sure nothing is blocking the fan

Parts Involved

Freezer BLDC Fan MotorMAIN PCB

How to Fix

  1. 1

    1. Enter self-diagnostic mode via Engineer Mode (select '3')

  2. 2

    2. Measure voltage at MAIN PCB CN51 pin 17 to pin 19 — should be DC 7V to 12V when motor is running

  3. 3

    3. Check pulse signal at CN51-15(PNK) — should alternate DC 7-12V with below DC 2V

  4. 4

    4. If no voltage, check connector CN51 for bad contact

  5. 5

    5. If voltage is present but fan does not spin, replace fan motor

  6. 6

    6. If fan motor is normal, replace MAIN PCB

This Error Applies To

Samsung RF22A4 Series Refrigerators (2021) (2021–present)

Service manual exact match: RF22A4221SG/AAService manual exact match: RF22A4121SG/AAService manual exact match: RF22A4110SG/AAService manual exact match: RF22A4220SG/AAService manual exact match: RF22A4111SG/AAService manual exact match: RF22A4010SG/AAService manual exact match: RF22A4221SR/AAService manual exact match: RF22A4121SR/AA+2 more

Related Error Codes

41

Control panel cannot talk to main circuit board

44

Main board cannot control the compressor

13

Humidity level cannot be monitored

33

Water in dispenser tank cannot be heated

52A

Freezer is not cold enough

62

Cannot detect compressor motor position

66

Inverter board is too hot

26

Ice maker water pipe cannot be heated

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