How do I fix error code FS E on a LG refrigerators?

1. undefined: Check for loose connection in CON7 on Main PCB. 2. undefined: Unplug connector from CON7. 3. undefined: Measure resistance between Blue/White and Blue/White wires. 4. undefined: If reading is 0 ohm (short): Replace the freezer sensor. 5. undefined: If reading is open (infinite/OL): Replace the refrigerator control board (Main PCB). 6. undefined: If reading is within normal range, verify against Temperature Table-1: -22F(-30C)=40.5-38.5kΩ, -13F(-25C)=30.5-28.5kΩ, -4F(-20C)=23-21.5kΩ, 5F(-15C)=17.5-16.5kΩ, 14F(-10C)=13.5-12.5kΩ, 23F(-5C)=10.5-9.5kΩ, 32F(0C)=8-7.5kΩ. 7. undefined: If resistance matches table for current temperature, sensor is good — inspect wiring harness for intermittent fault.

LG Refrigerators

Error Code FS E

Freezer Sensor Error

Moderate

Address soon - your appliance may not work properly

Also displayed as: FS E

How to Fix

1
Check for loose connection in CON7 on Main PCB.
2
Unplug connector from CON7.
3
Measure resistance between Blue/White and Blue/White wires.
4
If reading is 0 ohm (short): Replace the freezer sensor.
5
If reading is open (infinite/OL): Replace the refrigerator control board (Main PCB).
6
If reading is within normal range, verify against Temperature Table-1: -22F(-30C)=40.5-38.5kΩ, -13F(-25C)=30.5-28.5kΩ, -4F(-20C)=23-21.5kΩ, 5F(-15C)=17.5-16.5kΩ, 14F(-10C)=13.5-12.5kΩ, 23F(-5C)=10.5-9.5kΩ, 32F(0C)=8-7.5kΩ.
7
If resistance matches table for current temperature, sensor is good — inspect wiring harness for intermittent fault.

This Error Applies To

LG LFCS22520B Series Refrigerators

Service manual exact match: LFCS22520BService manual exact match: LFCS22520SService manual exact match: LFCS22520WService manual exact match: LFNS22520S