Samsung 1E Error: Freezer Defrost Sensor Error
How to diagnose Samsung refrigerator error code 1E (freezer sensor).
The freezer defrost temperature sensor (thermistor) circuit is open, shorted, or reading outside the permissible ohmic temperature curve.
Probable Causes
Failed NTC thermistor with broken internal resistance element.
Wiring harness connector pins corroded or disconnected behind rear evaporator cover.
Defective main control board sensor input analog-to-digital converter circuit.
Diagnostic & Testing Steps
- •1E or 1C error code flashing on front dispenser display.
- •Freezer evaporator coil freezing up with thick frost blanket.
- •Rising freezer temperature and soft ice cream.
Tools & Equipment Required
- ✓Digital Multimeter (Resistance Mode)Measure freezer defrost sensor (NTC thermistor) resistance: 5.0 kΩ at 25°C / 13.3 kΩ at 0°C.
- ✓Phillips #2 Screwdriver & Plastic Pry ToolCarefully remove freezer rear interior evaporator cover without cracking plastic clips.
- ✓Steamer or Hair Dryer (Low Setting)Safely melt ice dam buildup over evaporator coils without damaging aluminum fins.
- ✓Heavy Absorbent TowelsCatch melted defrost water inside freezer floor and protect air vents.
- ✓Inspection FlashlightInspect defrost sensor clip placement on top evaporator copper tube.
Fast Reset Sequence: Samsung Appliance Power & Keypad Reset
Before unmounting panels or beginning diagnostic procedures, attempt this manufacturer reset to clear transient microcomputer lockouts:
- 1.Press Power to shut down the front display console completely.
- 2.Unplug the appliance power cord from the electrical wall outlet.
- 3.While unplugged, press and hold both Power and Start/Pause simultaneously for 10 seconds to drain residual board capacitors.
- 4.Wait 3 minutes, restore electrical power, and run a Quick Rinse or Diagnostics cycle.
- 1
Step 1: Access Freezer Evaporator Sensor
[ ] DoneRemove freezer drawers, take out rear plastic cover screws, and unclip sensor mounted to evaporator tubing.
Verification:Wiring harness is undamaged and sensor clip is firmly attached. - 2
Step 2: Measure Thermistor Ohmic Resistance
[ ] DoneDisconnect 2-pin sensor plug and measure resistance across pins with digital multimeter in 20kΩ range.
Verification:Sensor reads ~5.0 kΩ at room temperature (77°F) or ~13.3 kΩ submerged in 32°F ice water. - 3
Step 3: Verify DC Reference Voltage from Main Board
[ ] DonePlug in unit briefly and measure DC voltage across wire harness connector: should read approximately 5.0 VDC.
Verification:5V reference is present, confirming main control board wiring harness integrity.
Repair Solutions
Unplug refrigerator and remove freezer rear evaporator panel to access sensor.
Test thermistor resistance in an ice water bath (should read ~13.3 kΩ at 32°F / 0°C).
Replace defective sensor clip-on harness assembly.
Frequently Asked Questions
Can a bad defrost heater trigger code 1E?
No, 1E specifically monitors the defrost thermistor circuit. Defrost heater issues trigger error code 4E or 5E.
Can I reset Samsung 1E from the front panel?
Press and hold Energy Saver + Lighting simultaneously for 8 seconds to reset the display after repairing the sensor.