Error Code EXT-SENSOR
The refrigerator cannot read the room temperature
Moderate
Address soon - your appliance may not work properly
Also displayed as: Freezer -21 C LED blinking
What This Means
Connector slipped out or open contact; Wire cut or short-circuited; Abnormal sensing temperature (above +65 C or below -50 C); Defective sensor
What actually causes this:
The sensor that measures the temperature of the room around the fridge has failed or come loose
First Thing to Check
Try unplugging the refrigerator for 5 minutes and plugging it back in
Parts Involved
How to Fix
- 1
1. Check that MAIN PCB CN31 connector is properly inserted
- 2
2. Measure voltage between CN31-1 (WHT) and CN31-2 (WHT)
- 3
3. Voltage should be within 0.5V to 4.5V
- 4
4. Verify voltage at IC10 MICOM Pin #21 matches CN31 reading
- 5
5. If 0 Ohm, sensor is shorted; if infinity Ohm, sensor is open
This Error Applies To
Samsung RB10FSR4ESR Series Refrigerators
Related Error Codes
The refrigerator temperature sensor isn't reading correctly
The external temperature sensor isn't sending correct readings
The freezer temperature sensor isn't reading correctly
The freezer cannot read its own temperature
The fridge cannot read its own temperature
The condenser fan motor in the machine room isn't running
The freezer defrost heater isn't working
The defrost system cannot measure its temperature