LG Dishwasher LDS5811ST Repair Manual

The LG Dishwasher LDS5811ST is a built-in stainless steel dishwasher featuring QuadWash™ technology, LoDecibel™ quiet operation, TrueSteam® for sanitizing, SmartThinQ® connectivity, and multiple wash cycles. This repair manual provides comprehensive guidance for troubleshooting, maintenance, and repair procedures for qualified technicians and DIY enthusiasts.

1. Safety Precautions 2. Model Specifications 3. Component Identification 4. Disassembly Instructions 5. Common Issues & Diagnostics 6. Error Code Troubleshooting 7. Replacement Parts Guide 8. Electrical Schematics 9. Maintenance Procedures 10. Reassembly Guidelines 11. Testing & Verification

Safety Precautions

Before performing any repairs, ensure proper safety measures are followed to prevent injury and equipment damage.

HazardPrecaution
Electrical ShockDisconnect power at circuit breaker before servicing
Water DamageTurn off water supply and drain system before disconnecting hoses
Sharp EdgesWear protective gloves when handling internal components
Hot SurfacesAllow unit to cool completely before servicing heating elements
Chemical ExposureUse safety glasses when handling detergents or cleaning agents

Model Specifications

Component Identification

Key components and their locations within the dishwasher assembly.

  1. Control Panel: User interface with cycle selection and settings
  2. Door Latch Assembly: Mechanical and electronic locking mechanism
  3. Spray Arms: Upper and lower QuadWash™ rotating arms
  4. Heating Element: Bottom-mounted heating coil
  5. Pump Assembly: Circulation and drain pump system
  6. Inlet Valve: Water supply control valve
  7. Filter System: Triple filtration with stainless steel mesh
  8. Detergent Dispenser: Automatic soap and rinse aid release

Disassembly Instructions

Step-by-step guide for accessing internal components.

  1. Power Disconnect: Turn off circuit breaker and unplug unit
  2. Door Removal: Remove hinge covers and disconnect door springs
  3. Control Panel: Remove screws and carefully disconnect wiring harness
  4. Inner Door: Remove inner panel to access dispenser assembly
  5. Tub Access: Remove lower rack and filter assembly
  6. Base Plate: Remove screws to access pump and heating element

WARNING! Label all wires and take photos during disassembly for proper reassembly.

Common Issues & Diagnostics

SymptomPossible CauseDiagnostic Procedure
No PowerPower supply, door switch, control boardCheck circuit breaker, test door switch continuity, verify control board voltage
Not FillingInlet valve, water pressure, float switchTest valve solenoid, check water pressure, inspect float mechanism
Not DrainingDrain pump, drain hose, filter clogCheck pump operation, inspect hose for kinks, clean filter system
Poor CleaningSpray arms, water temperature, detergentInspect arm rotation, verify heating element, check detergent dispenser
Leaking WaterDoor seal, hose connections, tub cracksInspect door gasket, check hose fittings, examine tub for damage

Error Code Troubleshooting

Common error codes and their resolution procedures.

Error CodeDescriptionSolution
IEWater inlet errorCheck water supply, inlet valve, water pressure
OEDrain errorClear drain hose, check drain pump, clean filter
FEWater overflowInspect float switch, check water level sensor
LEMotor errorTest wash motor, check wiring connections
HEHeating errorVerify heating element, check temperature sensor

Replacement Parts Guide

Common replacement parts with their part numbers and descriptions.

Electrical Schematics

Key electrical components and wiring connections.

  1. Main Power Input: Black (Hot), White (Neutral), Green (Ground)
  2. Control Board: Central processing unit with multiple connectors
  3. Heating Element Circuit: 120V AC through thermal cutoff
  4. Motor Circuits: Wash and drain motor power and control
  5. Sensor Inputs: Temperature, water level, door switch signals
  6. User Interface: Membrane switch panel connections

CAUTION! Always verify power is disconnected before testing electrical components.

Maintenance Procedures

Routine maintenance to prevent common issues and extend appliance life.

  1. Filter Cleaning: Remove and clean filter assembly monthly
  2. Spray Arm Inspection: Check for clogs and free rotation quarterly
  3. Door Seal Cleaning: Wipe seal and door surface regularly
  4. Detergent Dispenser: Clean dispenser compartment to prevent clogs
  5. Drain Hose Check: Inspect for kinks or obstructions annually
  6. Interior Cleaning: Run empty cycle with vinegar monthly

Reassembly Guidelines

Proper reassembly procedures to ensure optimal performance.

  1. Reverse disassembly steps in order
  2. Ensure all seals and gaskets are properly seated
  3. Verify all electrical connections are secure
  4. Test mechanical components for proper operation
  5. Check for water leaks before final installation
  6. Verify all safety features function correctly

Tip: Use torque specifications for all fasteners to prevent damage.

Testing & Verification

Final testing procedures to verify repair success.

TestProcedureExpected Result
Power UpRestore power and observe control panelLights illuminate, no error codes
Water FillStart cycle and observe fill processWater fills to proper level in 2-4 minutes
Heating TestMonitor water temperature during cycleWater heats to 120-140°F
Drain TestVerify complete drainageAll water drains within 3-5 minutes
Full CycleRun complete wash cycleNormal operation, clean dishes, no leaks

Service Support: 1-800-243-0000; www.lg.com

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