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E457LG Dishwasher

LG Dishwasher Error E457 – Meaning, Causes & How to Fix

The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor.

Medium Severity
Low
Medium
High
Critical

Expert Verified

Reviewed by a Certified Electrical Engineer & Licensed Technician

Official Meaning

The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor.

Real-World Causes

  • 1Kinked or bent inlet hoses restricting water flow
  • 2Sensor damaged by moisture or mineral buildup
  • 3Clogged inlet filter screens
  • 4Blocked drain hose or pump filter
  • 5Faulty inlet valve solenoid

Symptoms

Look for these signs to confirm error E457 on your LG Dishwasher:

  • Appliance stops mid-cycle
  • Machine pauses and displays the error
  • Unusual clicking sounds as relays activate
  • Error displayed at the start of a cycle

DIY Fix (Safe)

  1. 1Verify household water and power supply conditions
  2. 2Inspect hoses and filters for blockages
  3. 3Restart appliance after disconnecting power for 5 minutes
  4. 4Clean filters and sensors if accessible
  5. 5Run diagnostic mode if available

Professional Action Required

  1. 1Test valves, sensors, and motors with a multimeter
  2. 2Inspect wiring harness and connectors
  3. 3Replace defective pumps, motors, sensors, or valves
  4. 4Inspect control board relays
  5. 5Replace electronic control board if failure is confirmed

Additional Context

Load Type
Any load type
Drain Related
Depends on cycle stage
Sensor Issues
Sensors may give incorrect readings if hoses are blocked

Frequently Asked Questions

What does LG Dishwasher error E457 mean?
The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor.
What causes LG Dishwasher E457 error?
Common causes include: Kinked or bent inlet hoses restricting water flow, Sensor damaged by moisture or mineral buildup, Clogged inlet filter screens.
How do you fix LG Dishwasher error E457?
Start with these DIY steps: Verify household water and power supply conditions. Inspect hoses and filters for blockages. If the error persists, professional service may be needed.

Related Error Codes

Other LG Dishwasher Errors

E876The appliance control system detected a condition indicating temperature sensor fault – thermistor readings are outside expected range
E552The appliance control system detected a condition indicating water supply error – the appliance is not receiving adequate water supply
E186The appliance control system detected a condition indicating temperature sensor fault – thermistor readings are outside expected range
E736The appliance control system detected a condition indicating temperature sensor fault – thermistor readings are outside expected range
E691The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor
E627The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor
E902The appliance control system detected a condition indicating fan motor failure – cooling or ventilation fan not operating
E256The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor

About the Author

Technical Review Team

Reviewed by certified technicians with 10+ years of LG repair experience. Every error code is verified against manufacturer service manuals and real-world repair data.