Error code reference

Samsung Refrigerator Error Code R-1-g

R-DEF Error (Refrigerator defrost error): Separation of defrost heater housing, contact error, disconnection, short circuit, temperature fuse failure, or defrost does not finish after heating continuously for more than 80 minutes.

SourceSamsung Refrigerator - Tech Sheet: Fast Track Troubleshooting (RF18H)10/13

Diagnostic procedure

The full R-1-g 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 CN72 wire from PCB, check resistance of CN70 White to Orange; shall be 103/397 ohm ±10% (or 120 ohm ±10% for models without ice maker). Check 0 Ohm for heater short, infinity for wire/bimetal open.

SourceSamsung RL62/RL67 Bottom Mount Freezer - Full Service Manualp. 34

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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