Error Code 1
Freezer temperature sensor has failed or disconnected
Moderate
Address soon - your appliance may not work properly
Also displayed as: LED 1 blink
What This Means
Sensor housing slipped out of connector; Wire cut (open circuit); Wire short circuit; Sensor reads temperature above +50°C or below -50°C (out of range)
What actually causes this:
The wire to the freezer thermistor has come loose, broken, or the sensor itself has gone bad — the control board can no longer read the freezer temperature.
First Thing to Check
Look at the sensor connector at Case Connector CN2 pins 1 and 5 to see if it is firmly seated.
Parts Involved
How to Fix
- 1
Access self-diagnostic mode by pressing Freezer Key + Fridge Key simultaneously for 8 seconds
- 2
Measure voltage at Case Connector CN2 pin #1 to pin #5 — should read between 1.0V and 4.5V
- 3
If voltage is out of range, inspect sensor housing and wire harness connection
- 4
Compare measured voltage to sensor resistance/voltage table to verify temperature correlation
This Error Applies To
Samsung RS27FDBTNS Series Refrigerators (2016) (2016–present)
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