Error code reference

Samsung Refrigerator Error Code F3

FZ-DEF-Sensor (Freezer Defrost Sensor) Error

FZ-DEF-Sensor (Freezer Defrost Sensor) Error — sensor housing separation, contact error, disconnection, or short circuit; detected temperature exceeds 149°F (+65°C) or below -58°F (-50°C).

First step from the service manual

Measure voltage at MAIN PCB CN30-"5" ↔ CN76-"1"; shall be between 4.5V ~ 1.0V.

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

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