Samsung Refrigerator Error Code 65E — Defrost Sensor Open or Shorted
What this means
The 65E error code indicates the defrost sensor (bi-metal thermostat) mounted on the evaporator coils is malfunctioning. This sensor monitors coil temperature during defrost and tells the control board when the coils are warm enough to stop the defrost heater. A faulty sensor can prevent defrost from running (leading to ice buildup) or cause the heater to run too long (wasting energy and warming the freezer).
Alternate codes: 65C
Step-by-step fix
4 stepsPower cycle the refrigerator
Unplug for 5 minutes and restore power. If the code clears and the fridge starts cooling normally, monitor for 48 hours.
If the freezer is already iced up, you will need to manually defrost before the fridge can cool properly again.
Access the defrost sensor
Unplug the refrigerator. Remove the freezer rear panel to expose the evaporator coils. The defrost sensor or bi-metal thermostat is typically clipped to the evaporator tubing near the top of the coil assembly.
If heavy ice covers the area, thaw it first with a hair dryer so you can safely access the sensor.
Test the defrost sensor
Disconnect the sensor wire harness. At freezer temperature (around 0°F / -18°C), a bi-metal thermostat should show open (OL). At room temperature it should show continuity (closed). If it reads the opposite or shows no change, it is faulty.
If your model uses a thermistor-type sensor instead of bi-metal, test for resistance — expect about 5 kOhms at room temperature.
Replace the defrost sensor
Unclip the old sensor from the evaporator tube and install the replacement in the same position. Reconnect the wiring, replace the panel, and restore power.
Run a forced defrost after replacement to confirm the defrost cycle completes properly.
When to call a professional
If the sensor tests good but defrost still does not function, the defrost heater or the control board's defrost relay may be the issue. A technician should diagnose the full defrost circuit.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Defrost Thermostat / Bi-metal
Part #DA47-00243C · $10–$20
If thermostat fails continuity test
Defrost Sensor (Thermistor type)
Part #DA32-10105R · $8–$18
If model uses thermistor instead of bi-metal
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