LG Dishwasher Error Code E3: Causes, Fixes, and Prevention Guide

If your LG dishwasher suddenly stops mid-cycle and displays the E3 error code, it’s usually pointing to a heating problem.

This error means the water inside your dishwasher is not reaching the required temperature, which can affect cleaning performance and hygiene.

What Does LG Dishwasher Error Code E3 Mean?

The E3 error code indicates a heating failure or abnormal water temperature rise.

Your dishwasher expects water to heat within a certain time. If it doesn’t, the system stops the cycle and shows E3 to prevent ineffective washing.

Common Causes of E3 Error

1. Faulty Heating Element

• The heating element may be damaged or burnt out

• Water cannot heat properly

2. Thermistor (Temperature Sensor) Issue

• Sensor not reading temperature correctly

• Sends wrong signals to the control board

3. Control Board Malfunction

• Fails to regulate heating cycle

• Miscommunication with heater

4. Wiring Problems

• Loose or damaged wires

• Interrupted power supply to heating element

5. Low Water Temperature Supply

• Incoming water already too cold

• Heater struggles to reach required level

How to Fix LG Dishwasher E3 Error

Step 1: Power Reset

• Turn off the dishwasher

• Unplug it for 10–15 minutes

• Restart to clear temporary glitches

Step 2: Check Water Supply Temperature

• Ensure inlet water is at least 50°C (122°F)

• Run hot water in the sink before starting the dishwasher

Step 3: Inspect Heating Element

• Look for visible damage or burn marks

• If faulty, it needs replacement

Step 4: Examine Wiring Connections

• Check for loose or broken wires

• Secure connections carefully

Step 5: Test Thermistor

• If temperature readings are inconsistent, replace the sensor

How to Prevent E3 Error

• Always start with hot water supply

• Use proper dishwasher cycles

• Avoid overloading

• Maintain regular servicing

• Check internal components periodically

Final Thoughts

The LG dishwasher E3 error code mainly signals a heating issue, which can reduce cleaning effectiveness if ignored.

While simple fixes like resetting or ensuring hot water supply may solve it, persistent problems often require component checks or replacement.

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