How do I fix error code FREEZER_DEF_SENSOR_ERROR on a Samsung refrigerators?

1. undefined: Check MAIN PCB connector CN31 is fully seated 2. undefined: Measure voltage between CN31-3 and CN31-4; normal range 4.5V~1.0V 3. undefined: Check MICOM IC01 pin 6 voltage matches CN31-3/4 4. undefined: Disconnect CN31 and measure defrost sensor resistance vs DATA1 table 5. undefined: Check solder at R313

Samsung Refrigerators2017–present

Error Code FREEZER_DEF_SENSOR_ERROR

Q: What does error code FREEZER_DEF_SENSOR_ERROR mean on a Samsung refrigerators?

Freezer defrost sensor is faulty or not connected Disconnected or poorly seated connector at MAIN PCB CN31 pins 3 and 4; Open or shorted F DEF thermistor; Solder defect at R313 on PCB; Failed MICOM IC01 pin 6

Freezer defrost sensor is faulty or not connected

Moderate

Address soon - your appliance may not work properly

Also displayed as: F LED blinks (Freezer indicator)

What This Means

Disconnected or poorly seated connector at MAIN PCB CN31 pins 3 and 4; Open or shorted F DEF thermistor; Solder defect at R313 on PCB; Failed MICOM IC01 pin 6

What actually causes this:

The defrost sensor in the freezer evaporator area has failed or its wiring connector is loose.

First Thing to Check

Reseat the connector at CN31 on the main board and recheck.

Parts Involved

Freezer defrost sensor (F DEF, thermistor 502AT)MAIN PCB connector CN31Resistor R313

How to Fix

1
Check MAIN PCB connector CN31 is fully seated
2
Measure voltage between CN31-3 and CN31-4; normal range 4.5V~1.0V
3
Check MICOM IC01 pin 6 voltage matches CN31-3/4
4
Disconnect CN31 and measure defrost sensor resistance vs DATA1 table
5
Check solder at R313

This Error Applies To

Samsung RF23M80 Series Refrigerators (2017) (2017–present)

Service manual exact match: RF23M80*0**Service manual exact match: RF23M8090SR/AAService manual exact match: RF23M8070SR/AAService manual exact match: RF23M8070SG/AAService manual exact match: RF23M8090SG/SAService manual exact match: RF23M8080SR/EE