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Model reference

LG LFX21975ST02

Refrigerator

2 documents10 error codes10 service modes

Available documentation

Service Manual

  • Refrigerator Service Manual52 pg
    Covers this model
  • Refrigerator Service Manual52 pg
    Covers this model
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Error codes (10)

CodeMeaning
Er CFAbnormality of BLDC fan motor for mechanic (condenser) roomEr COCommunication error between MICOM of Main PCB and Display MICOM.Er dHPoor defrostingEr dSDefrosting sensor error caused by short or disconnection of the defrosting…Er FFAbnormality of BLDC fan motor for freezerEr FSFreezer sensor error caused by short or disconnection of the freezer sensor.Er IFAbnormality of BLDC fan motor for ice makingEr ISIcing sensor error caused by short or disconnection of the icing sensor.Er rSRefrigerator sensor error caused by short or disconnection of the refrigerator…Er rtRoom temperature sensor error (displayed when ICE PLUS key and Freezer Temp key…

Service modes (10)

  • Display °F/°C TogglePress and hold the FRZ TEMP and REF TEMP keys at the same time for over 5 seconds.
  • Icemaker Test ModePress and hold the Fill Key on the icemaker for 3 seconds.
  • LED Check FunctionSimultaneously press Ice Plus button and freezing temperature adjustment button for one second.
  • RESET (Exit Test Mode)Push the test button one time while in TEST3 mode.
  • RESET (from TEST mode)Press the test button one time while in TEST3.
  • TEST1 (Forced Cooling)Press the test button on the Main PCB controller one time.
  • TEST2 (Damper Close Test)Push the test button one time while in TEST1 mode.
  • TEST2 (Damper Close)While in TEST1, press the test button on the Main PCB controller one time.
  • TEST3 (Forced Defrost)Push the test button one time while in TEST2 mode.
  • TEST3 (Forced Defrosting)While in TEST2, press the test button on the Main PCB controller one time.

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

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