LG Dryer DLG4871W Service Manual

The LG DLG4871W is a 7.4 cubic foot electric dryer with advanced features including Sensor Dry technology, multiple drying cycles, steam refresh option, and smart diagnostics. This service manual provides comprehensive information for technicians including disassembly procedures, troubleshooting guides, wiring diagrams, and replacement part information for proper maintenance and repair.

1. Safety Precautions 2. Technical Specifications 3. Component Identification 4. Disassembly Procedures 5. Electrical System 6. Testing and Diagnostics 7. Replacement Parts 8. Reassembly Guidelines 9. Error Codes 10. Maintenance Schedule

Safety Precautions

Before performing any service procedures, ensure proper safety measures are followed.

HazardPrecaution
Electrical ShockDisconnect power before servicing. Verify power is off with voltmeter.
High TemperatureAllow dryer to cool completely before disassembly.
Sharp EdgesWear protective gloves when handling internal components.
Gas LeaksCheck all connections with leak detection solution if gas model.
Moving PartsEnsure drum is stationary before beginning disassembly.

Technical Specifications

Component Identification

Major components and their locations within the dryer assembly.

ComponentLocationFunction
Control BoardFront consoleManages all dryer functions and cycles
Heating ElementRear cabinetGenerates heat for drying process
MotorBottom frontDrives drum rotation and blower
Thermal FuseExhaust ductSafety device to prevent overheating
Moisture SensorDrum interiorDetects moisture levels for automatic drying
BeltDrum to motorTransfers motor power to drum
Idler PulleyUnder drumMaintains belt tension

Disassembly Procedures

Step-by-step instructions for accessing internal components.

  1. Top Panel Removal: Remove two screws at rear, slide top forward and lift off.
  2. Console Removal: Remove screws securing control panel, disconnect wiring harnesses.
  3. Front Panel Removal: Remove screws along sides and bottom, disconnect door switch.
  4. Drum Removal: Remove belt, lift front of drum, slide forward and out.
  5. Heating Element Access: Remove rear panel screws, access heating chamber.

WARNING! Always disconnect power and document wire connections before disassembly.

Electrical System

Wiring diagrams and electrical component testing procedures.

ComponentTest ProcedureExpected Values
Heating ElementCheck continuity across terminals10-50 ohms
Thermal FuseContinuity test0 ohms (closed circuit)
MotorCheck windings resistance2-10 ohms between terminals
ThermostatContinuity at room temperature0 ohms (closed)
Door SwitchContinuity with door closed0 ohms (closed)

Testing and Diagnostics

Procedures for diagnosing common dryer problems.

  1. No Heat: Test heating element, thermal fuse, and thermostats.
  2. No Rotation: Check motor, belt, idler pulley, and door switch.
  3. Poor Drying: Verify airflow, check lint filter and exhaust vent.
  4. Error Codes: Use diagnostic mode to retrieve stored error codes.
  5. Electrical Issues: Verify power supply and check all safety devices.

Replacement Parts

Common replacement parts with manufacturer part numbers.

Part DescriptionPart NumberNotes
Heating Element5301EL1002AIncludes mounting hardware
Thermal Fuse5301EL2001BCutoff temperature 154°C
Drive Motor4681EL2002AIncludes motor pulley
Drive BeltMDS454774014 rib, 89.5 inch
Door SwitchBCS30273001Normally open type
Control Board6871EL2002AMain PCB assembly

Reassembly Guidelines

Proper procedures for reassembling dryer after service.

  1. Install drum and verify free rotation before installing belt.
  2. Route belt properly around drum, motor pulley, and idler assembly.
  3. Ensure all wiring harnesses are properly connected and secured.
  4. Verify door switch alignment and operation.
  5. Test all functions before returning to customer.

CAUTION! Ensure all safety devices are reinstalled and functioning properly.

Error Codes

Common error codes and their meanings for the DLG4871W model.

Error CodeDescriptionTroubleshooting
tEThermistor errorCheck moisture sensor connections
dEDoor switch errorVerify door switch operation
HEHeating errorCheck heating element and thermostats
LEMotor errorTest motor and associated wiring
PFPower failureReset dryer, check power supply

Maintenance Schedule

Recommended maintenance intervals for optimal performance.

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