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E820LG Dishwasher

LG Dishwasher Error E820 – Meaning, Causes & How to Fix

The appliance control system detected a condition indicating drain system failure – water cannot remove water properly.

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 drain system failure – water cannot remove water properly.

Real-World Causes

  • 1Low water pressure in the plumbing system
  • 2Loose wiring harness
  • 3Control board failure
  • 4Water supply faucets are not fully open
  • 5Clogged inlet filter screens

Symptoms

Look for these signs to confirm error E820 on your LG Dishwasher:

  • Error displayed at the start of a cycle
  • Appliance stops mid-cycle
  • Very slow filling or draining behavior
  • Machine pauses and displays the error

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 E820 mean?
The appliance control system detected a condition indicating drain system failure – water cannot remove water properly.
What causes LG Dishwasher E820 error?
Common causes include: Low water pressure in the plumbing system, Loose wiring harness, Control board failure.
How do you fix LG Dishwasher error E820?
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
E698The appliance control system detected a condition indicating drain system failure – water cannot remove water properly
E540The appliance control system detected a condition indicating drain system failure – water cannot remove water properly
E160The appliance control system detected a condition indicating drain system failure – water cannot remove water properly
E278The appliance control system detected a condition indicating drain system failure – water cannot remove water properly

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.