Error code reference

Samsung Refrigerator Error Code 3C

Freezer compartment defrosting sensor error

Freezer compartment defrosting sensor error - voltage at MAIN PCB CN20-"6" to "8" is outside the 4.5V~1.0V range.

First step from the service manual

Check if MAIN PCB Connector CN20 is inserted correctly; measure voltage at CN20-"6" to "8".

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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