Model reference

LG GM-U552SQDM

Name: LG GM-U552SQDM
Brand: LG

Refrigerator

1 document5 error codes3 service modes

Available documentation

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Room temperature sensor failure —

From Service Manual 692336, p.28:

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

Demo Mode (OFF mode)Press the temperature adjustment button until the LED turns ON to activate (takes 10 seconds to…
Test Mode 1 (Pull-down mode)Press the test button (located on the main PCB) once to enter Test Mode 1.
Test Mode 2 (Defrost mode)Press the test button once while in Test Mode 1 to enter Test Mode 2.

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

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