Error code reference

Samsung Refrigerator Error Code FZ-DEF-Sensor Error

Freezer defrost sensor error due to separation of sensor housing, contact error, disconnection, or short circuit; or detected temperature exceeds +149°F(+65°C) or below -58°F(-50°C).

SourceSamsung RF4287 Refrigerator - Full Service Manualp. 60

Diagnostic procedure

The full FZ-DEF-Sensor Error procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check voltage of MAIN PCB CN30-"5" to N76-"1"; shall be between 4.5V~1.0V.

SourceSamsung RF4287 Refrigerator - Full Service Manualp. 60

More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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