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

1. undefined: Check CN20 connector insertion 2. undefined: Measure voltage between CN20 pins 10 and 12 (YEL and YEL) 3. undefined: Measure resistance between same pins 4. undefined: Compare to temperature table DATA1 5. undefined: Inspect sensor for physical damage

Samsung Refrigerators2020–present

Error Code F_SENSOR

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

Freezer compartment temperature sensor malfunction Bad connector contact at CN20 pin 10 and 12; Open circuit or short in sensor; Water damage to sensor or connector; Sensor age-related resistance change; Mechanical damage to sensor

Freezer compartment temperature sensor malfunction

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: F Sensor Error

What This Means

Bad connector contact at CN20 pin 10 and 12; Open circuit or short in sensor; Water damage to sensor or connector; Sensor age-related resistance change; Mechanical damage to sensor

What actually causes this:

Freezer temperature sensor disconnected or failed, preventing proper freezer cooling control

First Thing to Check

Check that connector CN20 is fully inserted and look for water or frost

Parts Involved

F SensorMAIN PCB CN20 connector pins 10-12R224 resistor (IC01 MICOM #7)

How to Fix

1
Check CN20 connector insertion
2
Measure voltage between CN20 pins 10 and 12 (YEL and YEL)
3
Measure resistance between same pins
4
Compare to temperature table DATA1
5
Inspect sensor for physical damage

This Error Applies To

Samsung RF28T5 Series Refrigerators (2020) (2020–present)

Service manual exact match: RF28T5101SR/AAService manual exact match: RF28T5A01S9/APService manual exact match: RF28T5021S9/EMService manual exact match: RF28T5001S9/MLService manual exact match: RF28T5021B1/COService manual exact match: RF28T5A01SR/AAService manual exact match: RF28T5021SR/AAService manual exact match: RF28T5001SR/AA