Error code reference

Samsung Refrigerator Error Code F7

FZ-DEF (Freezer Defrost Heater) Error

FZ-DEF (Freezer Defrost Heater) Error — defrost heater housing separation, contact error, disconnection, short circuit, temperature fuse error, or defrost does not finish after heating continuously for more than 80 minutes.

First step from the service manual

After separating MAIN PCB CN70 wire from PCB, measure resistance between CN70 Brown ↔ CN70 Gray; shall be 63 (230) ohm ±7%. 0 ohm = heater short, ∞ ohm = wire/bimetal open (must power off).

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
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