Error Code 04
Refrigerator temperature sensor malfunction or disconnection
Moderate
Address soon - your appliance may not work properly
Also displayed as: Right - ④ LED ON
What This Means
Connector missing or loose contact; Electric wire cut or damaged; Short circuit in sensor wiring; Sensor itself failure
What actually causes this:
The temperature sensor in the refrigerator section has failed or disconnected, preventing the control board from measuring fridge temperature
First Thing to Check
Check the refrigerator sensor connector at MAIN PCB CN30 for loose connections or visible damage
Parts Involved
How to Fix
- 1
Measure voltage between MAIN PCB CN30 #5 and #7
- 2
Voltage should be within 4.5V to 1.0V range
- 3
Check for wire continuity
- 4
Test sensor resistance at 25°C; should be 5.0 k ohms
This Error Applies To
Samsung RS25J500 Series Refrigerators (2010) (2010–present)
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