The LG LFX25976ST is a 25.5 cubic foot French Door Refrigerator with InstaView Door-in-Door, Craft Ice™ maker, Smart Cooling Plus™ system, and Wi-Fi connectivity. This repair manual provides essential information for troubleshooting, component replacement, and maintenance procedures. Below are key sections covering safety, specifications, diagnostics, disassembly, and part replacement.
Before performing any repair, ensure the refrigerator is unplugged from the power source. Wear appropriate personal protective equipment (PPE).
| Hazard | Precaution |
|---|---|
| Electrical Shock | Disconnect power before servicing. Verify with multimeter. |
| Refrigerant | Only EPA-certified technicians should handle refrigerant lines. |
| Sharp Edges | Wear cut-resistant gloves when handling interior components. |
| Heavy Parts | Use proper lifting techniques; two-person lift recommended for compressors/condensers. |
| Chemical Exposure | Use in well-ventilated area when handling cleaning agents or lubricants. |
Key components: Main Control Board, Inverter Compressor, Evaporator Fan Motor, Condenser Fan Motor, Defrost Heater, Temperature Sensors, Door Switches, Ice Maker Assembly, Water Inlet Valve, Display Board.
| Component | Location | Function |
|---|---|---|
| Main Control Board | Rear top compartment | Controls all refrigerator operations |
| Inverter Compressor | Bottom rear | Circulates refrigerant |
| Evaporator Fan Motor | Freezer section rear | Cools refrigerator compartment |
| Condenser Fan Motor | Bottom rear | Cools compressor and condenser |
| Defrost Heater | Behind freezer rear panel | Melts frost on evaporator coils |
| Ice Maker Assembly | Freezer door | Produces Craft Ice™ and cubed ice |
| Water Inlet Valve | Bottom left rear | Controls water flow to dispenser/ice maker |
To enter diagnostic mode: Press and hold "Ice Type" and "Light" buttons on the control panel for 3 seconds. Use "Temp" buttons to navigate.
| Error Code | Description | Possible Cause |
|---|---|---|
| Er IF | Ice Maker Failure | Ice maker motor, sensor, or harness issue |
| Er dF | Defrost Failure | Defrost heater, thermostat, or sensor |
| Er FF | Freezer Fan Failure | Evaporator fan motor or obstruction |
| Er CF | Condenser Fan Failure | Condenser fan motor or obstruction |
| Er tC | Temperature Sensor Failure | Fridge/Freezer/Ambient sensor open/short |
| Er PS | Power Surge | Voltage fluctuation detected |
Note: Clear error codes by unplugging unit for 1 minute or via diagnostic mode reset.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Refrigerator not cooling | Compressor, start relay, thermostat | Check compressor operation; test start relay; verify thermostat setting. |
| Excessive frost in freezer | Defrost system, door seal | Test defrost heater/thermostat; inspect door gasket for leaks. |
| Ice maker not working | Water supply, valve, motor | Check water line pressure; test inlet valve; inspect ice maker motor. |
| Water dispenser slow/no flow | Clogged filter, kinked line | Replace water filter (every 6 months); inspect supply line. |
| Unusual noise | Fan obstruction, compressor mount | Clear debris from condenser/evaporator fans; tighten compressor mounts. |
| Display panel blank | Power, control board, wiring | Verify power supply; test control board voltages; check harness connections. |
General Procedure: Unplug unit. Remove contents from shelves/drawers.
WARNING! Label all wires and take photos during disassembly for reassembly reference.
Water Filter Replacement: Turn filter clockwise to unlock; pull out. Insert new filter; turn counterclockwise until it clicks.
Evaporator Fan Motor: Remove freezer rear panel. Disconnect wire harness. Remove mounting screws. Install new motor; reverse steps.
Defrost Heater: Remove freezer rear panel. Disconnect heater wires. Remove heater retaining clips. Install new heater; ensure it's not touching coils.
Door Gasket: Peel back gasket from channel. Remove retaining screw(s) at top corners. Install new gasket; ensure it seats fully in channel.
Ice Maker Assembly: Remove screws securing ice maker. Disconnect water line and electrical connector. Install new unit; reconnect lines.
Main Control Board: Remove rear top service panel. Disconnect all harnesses. Remove board mounting screws. Transfer any jumpers to new board.
Refer to wiring diagram sticker located on rear of unit or inside control panel compartment.
Testing: Use multimeter to check continuity, voltage, and resistance per diagram specifications.
CAUTION! Do not use abrasive cleaners or sharp objects on interior surfaces. Unplug before cleaning.
Limited Warranty: 1 year parts and labor; 5 years sealed system; 10 years linear compressor.
Service Contact: LG Customer Service: 1-800-243-0000. Website: www.lg.com/us/support.
Parts Ordering: Use model number LFX25976ST. Authorized parts distributors: Encompass, Repair Clinic.
Safety Recall Check: Visit www.lg.com/recall to verify if unit is subject to any safety recalls.
Document Revision: Version 2.1 (March 2025).