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
Other Error Codes for RS25J500DWW
Main and panel control boards cannot communicate
Ice ejector or level sensor repeated failure
Freezer fan motor failure or control signal loss
Ice maker sensor malfunction or disconnection
Damper heater element or connection failure
Freezer defrost sensor malfunction or disconnection
Compressor startup failure or abnormal operation
Ambient temperature sensor malfunction or disconnection