LG LFX25960ST Repair Manual

The LG LFX25960ST is a 25 cubic foot French Door Refrigerator with dual ice makers, linear compressor, Smart Cooling Plus™ system, Door Cooling+™, and InstaView™ Door-in-Door®. This repair manual provides detailed instructions for diagnostics, disassembly, troubleshooting, and replacement of key components. Below are key sections for safety, model identification, error codes, component testing, and step-by-step repair procedures.

1. Model Identification & Specifications 2. Safety Precautions 3. Diagnostic Mode & Error Codes 4. Component Testing Procedures 5. Disassembly Instructions 6. Common Troubleshooting 7. Parts List & Diagrams 8. Reassembly & Final Check 9. Performance Verification 10. Regulatory & Warranty

Model Identification & Specifications

Key identifiers: Model LFX25960ST, Serial Number location (inside left wall), Product Number on rating plate.

Feature	Description
Capacity	25 cu. ft. Total (Fresh Food: 16.2 cu. ft., Freezer: 8.8 cu. ft.)
Refrigeration System	Linear Compressor, R-600a Refrigerant
Ice System	Dual Ice Makers (Craft Ice™ & Standard)
Special Features	InstaView™ Door-in-Door®, Smart Cooling Plus™, Door Cooling+™
Electrical	115 VAC, 60 Hz, 7.5 Amps
Dimensions (HxWxD)	69.875" x 35.75" x 34.75"

Safety Precautions

Before servicing, unplug refrigerator and follow electrostatic discharge (ESD) procedures.

Disconnect Power: Unplug from wall outlet before any repair.
Refrigerant Handling: R-600a is flammable. Evacuate and charge only by certified technician.
Component Handling: Allow capacitors to discharge. Use insulated tools.
Reassembly: Ensure all seals and connections are secure before restoring power.

WARNING! Risk of electric shock and explosion. Only qualified personnel should perform repairs involving refrigerant or electrical components.

Diagnostic Mode & Error Codes

Enter diagnostic mode by pressing and holding "Ice Type" and "Light" buttons on control panel for 3 seconds.

Error Code	Description	Possible Cause
ER-IF	Ice Maker Failure	Ice maker motor, sensor, or harness
ER-FF	Freezer Fan Failure	Fan motor obstruction or failure
ER-RF	Refrigerator Fan Failure	Fan motor or control board
ER-dF	Defrost System Error	Defrost heater, thermostat, or sensor
ER-CF	Compressor Communication	Linear compressor or main PCB

Component Testing Procedures

Use multimeter for continuity and resistance checks.

Linear Compressor: Check resistance between terminals (typical 10-20 Ω).
Defrost Heater: Disconnect and test for continuity (should read 20-40 Ω).
Thermistors (Fresh Food/Freezer): Measure resistance at room temp (approx. 10 kΩ).
Fan Motors: Check for 120 VAC at connector and motor continuity.
Main PCB: Verify input voltage (120 VAC) and output to components.

CAUTION! Label all wires before disconnecting. Document readings for reference.

Disassembly Instructions

Access internal components by removing panels and shelves.

Control Panel: Remove screws at top, gently pry cover, disconnect ribbon cables.
Fresh Food Door: Remove hinge cover, disconnect wiring harness, lift door off.
Freezer Drawer: Remove drawer front, disconnect ice maker harness.
Rear Panel: Remove screws to access compressor, condenser fan, and tubing.
Evaporator Cover: Remove screws inside freezer to access evaporator and defrost components.

Tip: Take photos during disassembly to aid reassembly.

Common Troubleshooting

Symptom	Possible Cause	Corrective Action
Not cooling	Compressor, start relay, thermostat	Test compressor windings; check for voltage at relay; replace if faulty.
Excessive frost	Defrost system failure	Test defrost heater, thermostat, and defrost sensor. Replace as needed.
Ice maker not working	Water valve, motor, sensor	Check water supply, valve voltage, ice maker motor continuity.
Unusual noise	Fan obstruction, compressor mount	Inspect evaporator and condenser fans; tighten compressor mounts.
Display blank	Power supply, control board	Verify 120 VAC at outlet; test main PCB for output voltage.

Parts List & Diagrams

Refer to LG service part numbers for replacements.

Main Control Board: Part # 6321ER1003A
Linear Compressor Assembly: Part # 6738J2001B
Dual Ice Maker Assembly: Part # 5230JA2006A
Fresh Food Thermistor: Part # 6750W1D003A
Door Gasket Set: Part # MCS35286901
Condenser Fan Motor: Part # 5230JA1002C

Note: Always verify part number with model and serial number before ordering.

Reassembly & Final Check

Reverse disassembly steps, ensuring all connectors are secure.
Replace door gaskets and seals if removed; check for proper seating.
Level refrigerator using front leveling legs.
Restore power and enter diagnostic mode to clear any error codes.
Verify all functions: cooling, ice production, display operation.

WARNING! Do not power on until all panels are reinstalled and connections verified.

Performance Verification

After repair, monitor for 24 hours.

Temperature: Fresh Food: 37°F, Freezer: 0°F.
Ice Production: Full bin within 24 hours.
Noise Level: Normal compressor and fan operation; no unusual vibrations.
Door Seals: Check for cold air leaks using dollar bill test.

Regulatory & Warranty

This repair manual is for certified technicians. LG warranty may be voided by unauthorized repairs. Dispose of components per local regulations (refrigerant recovery required). For technical support or parts, contact LG Electronics at 1-800-243-0000 or visit www.lg.com.