How do I fix error code F dS on a LG refrigerators?

1. undefined: Step 1: Check if connector is disconnected or loose between Main PCB, defrost controller, and sensor. If yes, reconnect or repair the connector. 2. undefined: Step 2: Measure sensor resistance. If resistance is 0 Ω (shorted) or infinite Ω (open), replace the sensor. 3. undefined: Step 3: Check sensor resistance at measured ambient temperature against the resistance table (CON7, 19th pin to 22nd pin). Values range from 38 kΩ at 23°F to 16 kΩ at 59°F. 4. undefined: Step 4: If resistance is normal for the current temperature, explain to customer that unit is operating correctly. 5. undefined: Step 5: If resistance is abnormal but sensor and connector are good, replace Main PCB.

LG Refrigerators

Error Code F dS

Defrost Sensor Error — short or disconnection of defrost sensor

Moderate

Address soon - your appliance may not work properly

Also displayed as: F dS

How to Fix

1
Step 1: Check if connector is disconnected or loose between Main PCB, defrost controller, and sensor. If yes, reconnect or repair the connector.
2
Step 2: Measure sensor resistance. If resistance is 0 Ω (shorted) or infinite Ω (open), replace the sensor.
3
Step 3: Check sensor resistance at measured ambient temperature against the resistance table (CON7, 19th pin to 22nd pin). Values range from 38 kΩ at 23°F to 16 kΩ at 59°F.
4
Step 4: If resistance is normal for the current temperature, explain to customer that unit is operating correctly.
5
Step 5: If resistance is abnormal but sensor and connector are good, replace Main PCB.

This Error Applies To

LG LRFWS2906 Series Refrigerators

Service manual exact match: LRFWS2906SService manual exact match: LRFWS2906VService manual exact match: LRFWS2906D

Related Error Codes

E Rt

Room Temperature Sensor Error — short or disconnection of room temperature sensor

E IS

Icing Sensor Error — short or disconnection of icing sensor (ice maker sensor). Note: E IS displayed without user input indicates icing sensor fault; E IS generated by user action (pressing test switch within 1 week of ice twisting) indicates ice maker mechanical issue.

F dH

Defrost Heater Error — defrost temperature does not rise above 47°F (8°C) within expected time; caused by door gasket failure, defrost heater open, blown Fuse-M, or poor PCB relay

E FF

Freezer Fan (BLDC) Error — abnormality of BLDC fan motor for freezer; motor does not respond after 3 retry attempts (each attempt: 15s on, 10s off)

E CF

Condenser Fan (BLDC) Error — abnormality of BLDC fan motor for mechanical/condenser room

E CO

Communication Error — loss of communication between Main PCB MICOM and Display PCB MICOM; also between Transmitter and Receiver

E CL

Low Side Cycle Leakage — detected by low amplitude cycle variation; caused by low-side refrigerant leak, bad compressor, or extended door-open condition

E CH

High Side Cycle Leakage — detected by high amplitude cycle variation; caused by high-side refrigerant leak, restriction in system, bad compressor, or bad valve

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