Error Code 2
Fresh food compartment not reading correct temperature
Moderate
Address soon - your appliance may not work properly
Also displayed as: 2 (Fridge LED blinks)
What This Means
Fridge thermistor disconnected from MAIN PCB connector CN51; Fridge thermistor defective (open or shorted); Bad wiring between sensor and MAIN PCB; MAIN PCB defect
What actually causes this:
Temperature sensor is disconnected or broken
First Thing to Check
Make sure the wire connector is fully plugged in
Parts Involved
How to Fix
- 1
1. Enter self-diagnostic mode via Engineer Mode (select '3')
- 2
2. Measure voltage at MAIN PCB CN51 pin 14 to pin 13 — normal range: 1.0V to 4.5V
- 3
3. Disconnect CN51 and measure resistance between CN51 pins 14 and 13 — compare to temperature table
- 4
4. If 0 ohm: sensor is shorted. If infinite ohm: sensor or wire is open
- 5
5. Check MICOM input voltage at IC01 MICOM pin 8 and resistor R364 on PCB
- 6
6. If all tests pass, replace MAIN PCB
This Error Applies To
Samsung RF22A4 Series Refrigerators (2021) (2021–present)
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