Error code reference

Samsung Refrigerator Error Code 25E

FF-DEF Error

FF-DEF Error - fresh food compartment defrost heater housing separation, contact error, disconnection, short circuit, or temperature fuse error; defrosting does not finish after heating continuously for more than 80 minutes.

First step from the service manual

After separating MAIN PCB CN70 wire, measure resistance between CN70 White and CN70 Gray; shall be 120(440) 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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