Error code reference

Samsung Refrigerator Error Code 21E

Freezer Fan error-displayed when fan motor is operating and feedback signal line contact error, motor wire separation, or motor error occurs.

SourceSamsung Refrigerator - Tech Sheet: Fast Track Troubleshooting (RF24J9960S4/AA)

Diagnostic procedure

The full 21E 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
Check voltage of Main PCB CN76 pins 1 to 2; should be between 7V-12V.

SourceSamsung Refrigerator - Tech Sheet: Fast Track Troubleshooting (RF24J9960S4/AA)

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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