Model reference

LG LSC21943ST

Name: LG LSC21943ST
Brand: LG

Refrigerator

3 documents3 error codes8 service modes

Available documentation

LSC21943ST Owner's Manual31 pg
Covers this model
LG Refrigerator LSC21943ST Service Manual MFL62233706 10020392 pg
Covers this model

Service Bulletin - Changed the water valve for sxs models with indoor heating icemaker3 pg
Covers this model

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Ambient temperature sensor failure -

From Service Manual 346585, p.37:

1.Access service mode to confirm the active fault code and read stored error history.

2.Disconnect the sensor and measure resistance. Expected: 10 kΩ to 12 kΩ at 77°F (25°C).

3.Check the sensor harness for opens. A reading outside 5 kΩ to 50 kΩ indicates a failed sensor.

Part 6322FR2046G

Temperature thermistor

CodeMeaning

Change Display Fahrenheit to Celsius ModePress and hold FREEZER and REFRIGERATOR buttons simultaneously for more than 5 seconds.
Demo / Exhibition ModePress and hold the REFRIGERATOR and EXPRESS FRZ buttons simultaneously for 5 seconds until the…
Diagnostic (failure detection) functionThe diagnostic function automatically detects failure when failure is found in product during the…
Display Power Saving ModePress FREEZER and EXPRESS FRZ buttons simultaneously and hold for 5 seconds
Icemaker Test ModePress and hold the Water Amount Selection button on the icemaker for 3 seconds.
LCD Check FunctionSimultaneously press the super freezer (EXPRESS FRZ) button and the freezing temperature adjustment…
Test Mode 1 (Strong Cold / Forced Operation)Press the test button on the main PCB once
Test Mode 2 (Forced Defrost)Press the test button on the main PCB once while in Test Mode 1 status

Full entry steps, exit procedures, and test sequences are available in Max.

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