Error Code EXT-SENSOR
Ambient temperature sensor is open or shorted
Moderate
Address soon - your appliance may not work properly
Also displayed as: -21 deg C LED Lamp blinking
What This Means
Connector slipped out or poor contact; Wire cut or short circuit; Abnormal sensing temperature above +65 deg C or below -50 deg C; Defective thermistor
What actually causes this:
Disconnected, damaged, or failed ambient temperature thermistor
First Thing to Check
Verify CN30 connector seating then measure voltage at CN30 pins 2 and 4
Parts Involved
How to Fix
- 1
Check that MAIN PCB CN30 connector is properly inserted
- 2
Measure voltage between MAIN PCB CN30 pin 2 and pin 4
- 3
Voltage should be within 4.5V to 0.5V for normal operation
- 4
0V indicates short; 5V indicates open
- 5
Refer to DATA1 Temp Table for resistance vs temperature values
- 6
Replace sensor if voltage is out of range and connectors are good
This Error Applies To
Samsung RT Series Refrigerators (2021) (2021–present)
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