Error code reference

Samsung Refrigerator Error Code F-DEF Error (Low-resistance)

Freezer defrost heater fault (low resistance) - separation of heater housing, contact error, disconnection, short circuit, or temperature fuse error.

SourceSamsung French Door Refrigerator - Service Manual: RF26/27/31/32CG Seriesp. 99

Diagnostic procedure

The full F-DEF Error (Low-resistance) 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 & CN81 wire from PCB, measure resistance between CN70 5PIN - CN81 1PIN; should be 63 ohm ±7%.

SourceSamsung French Door Refrigerator - Service Manual: RF26/27/31/32CG Seriesp. 99

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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Where this code is documented

1 manual in the MyPros+ library documents this code for Samsung refrigerator.

Models covered by the manuals that document this code

More models are covered than are listed here.

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