LG LFXC24726S Service Manual

The LG LFXC24726S is a French Door Refrigerator featuring Linear Cooling technology, Door Cooling+, Smart Cooling Plus, and an external water and ice dispenser. This service manual provides authorized technicians with essential information for installation, diagnosis, repair, and maintenance. Below are key sections covering safety, specifications, component locations, disassembly, wiring diagrams, error codes, and troubleshooting procedures.

1. Safety Precautions 2. Product Specifications 3. Component Locations & Functions 4. Disassembly & Reassembly Instructions 5. Electrical Data & Wiring Diagrams 6. Error Code Diagnostics 7. Performance Test Procedures 8. Refrigerant System Information 9. Parts List & Exploded Views 10. Troubleshooting Flowcharts

Safety Precautions

Before servicing, read all safety warnings. Disconnect power before accessing electrical components. Use proper tools and personal protective equipment (PPE).

Hazard	Precaution
Electrical Shock	Unplug unit or disconnect circuit breaker before servicing.
Sharp Edges	Wear cut-resistant gloves when handling panels and shelves.
Refrigerant	Recover refrigerant according to EPA guidelines; avoid open flames.
Heavy Parts	Use assistance when lifting doors or compressor assembly.
Moving Parts	Ensure all covers are secured before restoring power.

Product Specifications

Model: LFXC24726S
Type: French Door Refrigerator with Bottom Freezer
Total Capacity: 26.2 cu. ft.
Refrigerant: R-600a (Isobutane)
Electrical: 115 VAC, 60 Hz, 7.5 A
Dimensions (HxWxD): 69.875" x 35.75" x 33.875"
Door Swing: Reversible (left/right hinge)
Features: Smart Cooling Plus, Door Cooling+, Ice & Water Dispenser, Linear Compressor
Weight: 306 lbs (138.8 kg)

Component Locations & Functions

Key components: Main Control Board, Linear Compressor, Evaporator Fan Motor, Condenser Fan Motor, Defrost Heater, Temperature Sensors, Water Inlet Valve, Ice Maker Assembly.

Main Control Board: Located at the top rear; manages all operations and error reporting.
Linear Compressor: Located at the bottom rear; provides variable cooling capacity.
Evaporator Fan: Inside freezer compartment; circulates cold air.
Condenser Fan: Bottom rear; cools condenser coils.
Temperature Sensors: Multiple sensors in fresh food and freezer compartments.
Ice Maker: Located in the freezer door; includes motor, heater, and fill cup.

WARNING! Identify all components before disassembly. Refer to wiring diagram for connections.

Disassembly & Reassembly Instructions

Step-by-step guide for accessing internal components.

Remove Door Handles: Remove screws under caps, detach handles.
Remove Top Grille: Pull forward to release clips.
Remove Control Panel: Remove screws, disconnect wire harnesses.
Remove Rear Access Panel: Remove screws to access compressor and condenser.
Remove Evaporator Cover: Remove freezer interior screws, lift cover.
Remove Ice Maker: Disconnect water line and electrical connector, remove mounting screws.

CAUTION! Label all wires and connectors. Handle door gaskets carefully to avoid tears.

Electrical Data & Wiring Diagrams

Circuit diagrams and voltage specifications for troubleshooting.

Component	Resistance (Ohms)	Test Voltage
Compressor Windings	~10-15 (between terminals)	120 VAC
Evaporator Fan Motor	~200-400	12 VDC
Defrost Heater	~20-40	120 VAC
Water Inlet Valve	~200-500	120 VAC

Wiring Diagram Reference: See page 12 for complete schematic. Verify continuity on all harnesses.

Error Code Diagnostics

Error codes displayed on control panel indicate specific faults.

Error Code	Description	Possible Cause
ER-IF	Freezer Sensor Fault	Open/short circuit in freezer sensor or wiring.
ER-FF	Fresh Food Sensor Fault	Open/short circuit in fresh food sensor.
ER-dF	Defrost Sensor Fault	Defrost sensor failure or poor contact.
ER-CF	Condenser Fan Fault	Fan motor blocked, faulty, or wiring issue.
ER-HI	High Temperature Error	Compressor not cooling; check refrigerant charge.

Reset: Clear codes by disconnecting power for 5 minutes. If code returns, replace indicated component.

Performance Test Procedures

Verify system operation after repair.

Temperature Test: Set fresh food to 37°F, freezer to 0°F. Monitor with external thermometer for 24 hours.
Compressor Run Test: Listen for smooth operation; check amp draw (4.2-5.8 A).
Defrost Cycle Test: Force defrost via service mode; verify heater operation and termination.
Dispenser Test: Check water flow and ice production cycle.
Door Seal Test: Close door on dollar bill; should have firm resistance when pulled.

Tip: Use a clamp meter to verify compressor current matches nameplate rating.

Refrigerant System Information

System uses R-600a (Isobutane), a flammable hydrocarbon refrigerant.

Charge Amount: 2.3 oz (65 grams)
Oil Type: Polyolester (POE) oil
Service Ports: Access valves on compressor process tubes.
Leak Detection: Use electronic leak detector compatible with hydrocarbons.
Evacuation: Deep vacuum to 500 microns or less before recharging.

WARNING! No sparks or open flames. Ventilate area. Recover refrigerant; do not vent to atmosphere.

Parts List & Exploded Views

Reference numbers for major replacement parts.

Part Number	Description	Qty
MCL63937401	Main Control Board Assembly	1
MLA37477504	Linear Compressor Assembly	1
MSE21432202	Evaporator Fan Motor	1
6321ER1002B	Ice Maker Assembly	1
MDA21577201	Door Gasket (Fresh Food)	1
MDA21577202	Door Gasket (Freezer)	1

Note: For complete parts catalog, refer to LG Parts website or contact LG Service Support.

Troubleshooting Flowcharts

Structured diagnosis for common symptoms.

Symptom	Check	Action
Not cooling	Power, compressor operation, fans	Verify voltage to compressor; check for blocked condenser; test sensors.
Excessive frost	Defrost heater, thermostat, cycle	Test heater for continuity; check defrost thermostat; force defrost cycle.
No ice production	Water supply, ice maker motor, fill cup	Check water inlet valve; inspect ice maker motor and heater; clear fill cup.
Water dispenser not working	Water filter, inlet valve, pressure	Replace filter; test valve solenoid; verify household water pressure (≥20 psi).
Unusual noise	Fan blades, compressor mounts, tubing	Inspect for obstructions; tighten compressor mounts; check for tubing contact.

Service Contact: LG Electronics Service Division: 1-800-243-0000. Website: www.lg.com/us/support.