Lg Dishwasher Error E4

⚡ Quick Answer: The LG dishwasher error code E4 indicates an overflow condition, typically caused by excessive water detection in the tub or base pan. This triggers t... ✅ DIY Fixable

What Does Error E4 Mean?

The LG dishwasher error code E4 indicates an overflow condition, typically caused by excessive water detection in the tub or base pan. This triggers the float switch, leading to a safety response that may result in water pooling at the base of the unit and a continuous beeping sound. To address this, users can perform basic checks like removing standing water and inspecting the drain hose for blockages.

Common Symptoms:

  • Dishwasher detecting too much water in tub or base pan
  • Drain cycle may run continuously or display error during/after cycle
  • No official LG specific documentation found for E4 code

Possible Causes

  • Water overflow / leakage detected (float switch triggered) (medium)

How to Fix Error E4

DIY Fix Basic checks and reset

  1. Turn off dishwasher and disconnect power (unplug or breaker off)
  2. Check for standing water at the bottom and remove water manually if safe
  3. Inspect drain hose for kinks/blockages and straighten or clear debris
  4. Clean dishwasher filter and check sump for obstructions
  5. Restore power and run a short cycle to see if error persists

Technician Only Inspect and repair internal components

  1. Verify float switch operation and replace if stuck or malfunctioning
  2. Check and service drain pump and associated hoses for clogs or mechanical failure
  3. Inspect seals and hoses for leaks and repair or replace defective parts
  4. Test control signals to water level sensors to ensure accurate detection

Parts needed: float switch, drain pump, drain hose, seals/gaskets

🛑 When to Call a Pro:
  • If error persists after basic user troubleshooting
  • If water continues to leak or cannot be drained manually
  • If internal components (float switch, pump) require replacement beyond user capability

Technical Specifications

wattage 1000W
component Float Switch
resistance 10-20 ohms
part_number LG 5221ER1004A
voltage_rating 120V AC

Common Questions

What does E4 error mean on LG dishwasher?

E4 error indicates an overflow condition, often due to excessive water in the tub or base pan.

Can I fix LG dishwasher E4 error myself?

Yes, you can perform basic checks like removing standing water and inspecting the drain hose.

How much does it cost to fix E4 error?

Repair costs for E4 error typically range from $100 to $400, depending on parts and labor.

When should I call a technician for E4?

Call a technician if the error persists after troubleshooting, or if internal components need replacement.

Data last verified: 2026-01-10

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