Error Code 5C
Freezer defrost sensor is disconnected or reading out of range
Moderate
Address soon - your appliance may not work properly
Also displayed as: 5C
What This Means
Defrost sensor connector loose or disconnected at CN20; Sensor wire damaged or broken; Defective defrost sensor (DTN-C502)
What actually causes this:
The sensor that tells the board when the freezer evaporator has fully defrosted is faulty or unplugged, which can cause ice build-up over time.
First Thing to Check
Remove the freezer evaporator cover and confirm the defrost sensor connector is firmly plugged in.
Parts Involved
How to Fix
- 1
Check Main PCB CN20 connector is fully seated
- 2
Measure voltage between CN20 PIN 6 and PIN 8; should be 4.5V to 1.0V
- 3
Compare voltage to temperature table
- 4
Check sensor model: THERMISTOR DTN-C502, spec 5.0 kΩ at 25°C (77°F)
- 5
Replace sensor if out of spec
This Error Applies To
Samsung DRF36C Series Refrigerators (2022) (2022–present)
Related Error Codes
Internal I/O expander chip on main board has a communication fault
Freezer temperature sensor is disconnected or out of range
Freezer evaporator fan is not running when it should be
Condenser fan motor in the machine compartment is not running
External temperature sensor is unplugged or has failed
Freezer defrost heater or safety cutout has failed or wiring is open
Fridge temperature sensor is disconnected or out of range
Humidity sensor is disconnected or out of range