Model reference
LG LMX28988ST
Refrigerator
5 documents14 error codes24 service modes
Available documentation
Service Manual
- Refrigerator Service Manual81 pg
- Refrigerator Service Manual82 pg
- Refrigerator Service Manual82 pg
- Refrigerator Service Manual82 pg
Bulletin
- Service Bulletin - Refrigerator - New ice maker with two more cell (12Cell->14Cell)5 pg
MyPros+ Max
Diagnose your LG LMX28988ST.
- Step-by-step diagnostics from the service manual
- Test values, resistance specs, and wiring references
- Verified part numbers when replacement is needed
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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 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 gFFlow meter (sensor) defectEr IFAbnormality of BLDC fan motor for ice makingEr ISIcing sensor error caused by short or disconnection of the icemaker-related…Er ItIce maker kit defectEr 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 (24)
- Display Check FunctionSimultaneously press Ultra Ice button and Freezer temperature adjustment button for a second…
- Display ModeWith 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 the refrigerator door open, press and hold the Refrigerator Temp Button and ICE PLUS Button…
- Error Code CheckPress the Ice Plus button and Freezer button simultaneously within 3 hours of the 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
- Icemaker Fill Test ModePress and hold the FILL Key on the icemaker unit for about 3 seconds.
- Icemaker Test ModePress and hold the FILL Key on the icemaker for about 3 seconds. The icemaker will run through 3…
- Power Save Mode TogglePress the ICE PLUS Button and Freezer TEMP button simultaneously for more than 5 seconds to toggle…
- 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 - Compressor/Damper/All Fans OnPush 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 1 (Forced Operation)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)Push the test button on the Main PCB 3 times
- Toggle °F / °C DisplayPress and hold the FRZ TEMP and REF TEMP keys at the same time for over 5 seconds.
- Toggle °F/°C DisplayPress and hold the FRZ TEMP and REF TEMP keys at the same time for over 5 seconds.
- Toggle Display °F / °CPress 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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