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Error code reference
Samsung Refrigerator Error Code F-DEF
Freezer defrost heater error
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Diagnostic procedure
The full F-DEF 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
After separating Main PCB CN70 and CN85, measure resistance between CN70 PIN 5 and CN85 PIN 3; should be 63 ohm ±7% (230V model). 0 ohm = heater short, infinity = wire/bimetal open.
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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