Error Code 31
Cool Select Room fan is not operating
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 31C
What This Means
Fan connector not seated at Main PCB CN74 pins 1-5; Fan motor wire damaged or broken; Fan motor defective (bearing stuck or motor failure); Main PCB defective or fan relay faulty
What actually causes this:
Fan motor failed or air duct blocked
First Thing to Check
Check if cool select room is reaching target temperature
Parts Involved
How to Fix
- 1
1. Unplug and inspect CN74 connector pins 1-5
- 2
2. Check for loose or corroded connections
- 3
3. Reseat connector firmly
- 4
4. Power on and listen for fan operation
- 5
5. Measure voltage at CN74-1 to CN74-5 — normal 7V to 12V
- 6
6. If voltage present but fan inoperative, replace fan motor
- 7
7. If voltage abnormal, check Main PCB relay
This Error Applies To
Samsung RF22N9781 Series Refrigerators (2018) (2018–present)
Related Error Codes
Freezer temperature sensor malfunction
Room temperature sensor not working
Ice maker temperature sensor failure
Fridge temperature sensor is not responding
Convertible zone temperature sensor failure
Ice storage area temperature sensor malfunction
Freezer defrost sensor is faulty
Convertible zone defrost sensor malfunction