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Model reference

LG LFX28978SW/04

Refrigerator

5 documents14 error codes27 service modes

Available documentation

Service Manual

  • Refrigerator Service Manual80 pg
    Covers this model
  • Refrigerator Service Manual80 pg
    Covers this model
  • Refrigerator Service Manual85 pg
    Covers this model
  • Refrigerator Service Manual84 pg
    Covers this model
  • Refrigerator Service Manual81 pg
    Covers this model
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Error codes (14)

CodeMeaning
Er CFAbnormality of BLDC fan motor for mechanic room (condenser fan)Er COCommunication error between Micom of Main PCB and Display MicomEr dHPoor defrosting errorEr 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 gFFlow meter (sensor) defect caused by error of flow meter or water input or low…Er IFAbnormality of BLDC fan motor for ice makingEr ISIcing sensor error caused by short or disconnection of the icemaker sensor…Er ItIce maker kit defect caused by other electrical system errors such as motor…Er rFAbnormality of BLDC fan motor for refrigeratorEr rSRefrigerator sensor error caused by short or disconnection of the refrigerator…Er rtRoom temperature sensor error caused by short or disconnection of the room…Er SSPantry sensor error caused by short or disconnection of the pantry sensor.

Service modes (27)

  • Display Check FunctionSimultaneously press Ultra Ice button and freezing temperature adjustment button for a second
  • Display Mode (Demo/Showroom)With the refrigerator door open, press and hold the Refrigerator Temp Button and ICE PLUS Button…
  • Display Mode (Showroom Mode)With the refrigerator door open, press and hold the Refrigerator Temp Button and ICE PLUS Button…
  • Display Mode (Showroom)With the refrigerator door open, press and hold the Refrigerator Temp Button and ICE PLUS Button…
  • Display Mode (Showroom/Demo)With refrigerator door open, press and hold the Refrigerator Temp Button and ICE PLUS Button for…
  • Error Code CheckWithin 3 hours of initial error
  • Error Code Check (within 3 hours of error)Press the Ice Plus button and Freezer button simultaneously.
  • Error Code Check (within 3 hours)Press the Ice Plus button and Freezer button simultaneously.
  • Ice Detecting Sensor Diagnosis1
  • Ice-detecting Sensor Diagnosis1
  • Icemaker Test ModePress and hold the FILL Key on the icemaker for about 3 seconds.
  • Power Save Mode TogglePress the ICE PLUS Button and Freezer TEMP button simultaneously for more than 5 seconds.
  • Temperature Display Toggle (°F/°C)Press and hold the FRZ TEMP and REF TEMP keys at the same time for over 5 seconds.
  • Temperature Unit Toggle (°F/°C)Press and hold the FRZ TEMP and REF TEMP keys at the same time for over 5 seconds.
  • Test 1 Mode (Forced Operation)Push the test button on the Main PCB 1 time
  • Test 2 Mode (Damper Closed)Push the test button on the Main PCB 2 times
  • Test 3 Mode (Forced Defrost)Push the test button on the Main PCB 3 times
  • Test Mode 1 - Forced OperationPush the test button on the Main PCB 1 time
  • Test Mode 1 (All On)Push the test button on the Main PCB 1 time
  • Test Mode 1 (Comp/Damper/All FAN on)Push the test button on the Main PCB 1 time
  • Test Mode 2 - Damper ClosedPush the test button on the Main PCB 2 times
  • Test Mode 2 (Damper closed)Push the test button on the Main PCB 2 times
  • Test Mode 3 - Forced DefrostPush the test button on the Main PCB 3 times
  • Test Mode 3 (Forced defrost mode)Push the test button on the Main PCB 3 times
  • Test Mode 3 (Forced defrost)Push the test button on the Main PCB 3 times
  • Toggle °F / °CPress and hold the FRZ TEMP and REF TEMP keys at the same time for over 5 seconds.
  • Toggle °F/°C DisplayPress and hold FRZ TEMP and REF TEMP keys at the same time for over 5 seconds.

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

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