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Model reference

LG LMX21981

Refrigerator

2 documents11 error codes12 service modes

Available documentation

Service Manual

  • Lg_training_manual78 pg
    Covers this model
  • Refrigerator Service Manual52 pg
    Covers this model
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Error codes (11)

CodeMeaning
ERFan motor errorEr CFAbnormality of BLDC fan motor for machine (condenser) roomEr COCommunication error between MICOM of Main PCB and Display MICOM.Er dHDefrost cycle failureEr dSShort or disconnection of the defrosting sensor.Er FFAbnormality of BLDC fan motor for freezerEr FSFreezer sensor failureEr IFAbnormality of BLDC fan motor for ice makingEr ISIce room sensor failureEr rSRefrigerator sensor failureEr rtDefective ambient (room) sensor reading

Service modes (12)

  • Display Mode (Showroom/Demo)With the refrigerator door open, press and hold the Refrigerator Temp button and ICE PLUS button…
  • Display Power-Saving Mode["Simultaneously press the FREEZER and ICE PLUS buttons and hold them for 5 seconds until a tone…
  • Fahrenheit/Celsius Toggle["Simultaneously press and hold the FREEZER and REFRIGERATOR buttons for more than 5 seconds."]
  • Ice Maker Test ModePress and hold the Fill Key on the ice maker for 3 seconds. The icemaker will run through 3 stages
  • Icemaker Test Mode["Press and hold the cube size button for more than three seconds to put the icemaker into test…
  • LED Check FunctionSimultaneously press the Ice Plus button and the Freezer Temperature adjustment button for one…
  • Main PCB Test Mode["Press the test button on the main PCB controller."]
  • RESET (from test mode)Push the test button one time while in TEST MODE 3.
  • Temperature Display Toggle (°F/°C)Press and hold the FRZ TEMP and REF TEMP keys at the same time for over 5 seconds.
  • TEST MODE 1 (Forced Cooling)Push the test button on the main PCB controller one time.
  • TEST MODE 2 (Damper Close Test)Push the test button one time while in TEST MODE 1.
  • TEST MODE 3 (Forced Defrost)Push the test button one time while in TEST MODE 2.

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