Error code reference

Samsung Refrigerator Error Code 33E

FZ-DEF Heater Error

FZ-DEF Heater Error — freezer defrost heater housing separation, contact error, disconnection, short circuit, or temperature fuse error; defrost did not finish after 80 minutes continuous heating.

First step from the service manual

Separate Main PCB CN70 wire; measure resistance between CN70 Brown and CN70 Gray; should be 63 ohm ±7%. 0 ohm = heater short, infinity = wire/bimetal open.

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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