LG Dishwasher Error Code HE: How to Fix It

Medium 1-2 hours High Severity Verified June 2026
Error Code
HE
Brand
LG
Product Type
dishwasher
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
LG dishwasher error code HE indicates a heating element malfunction where the water isn't reaching the proper temperature for effective cleaning. This error typically points to a failed heating element, faulty thermistor (temperature sensor), or related wiring issues that prevent proper water heating during wash cycles.
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Tools You'll Need

How to Fix Error Code HE

  1. Power Down and Safety Check

    Always disconnect power before servicing electrical appliances to prevent shock or electrocution.
  2. Check Water Temperature at Source

  3. Inspect Wiring Connections

    Ensure power is disconnected before touching any wiring.
  4. Test Heating Element Continuity

  5. Test Thermistor Sensor

  6. Replace Faulty Heating Element

    Handle heating elements carefully as they can be sharp. Ensure proper gasket placement to prevent water leaks.
  7. Replace Faulty Thermistor

  8. Reassemble and Test

Parts You May Need

Dishwasher heating element
Check Price on Amazon
Thermistor temperature sensor
Check Price on Amazon
Wire nuts or electrical connectors
Check Price on Amazon
Dishwasher heating element
Check Price on Amazon
Thermistor temperature sensor
Check Price on Amazon
Wire nuts or electrical connectors
Check Price on Amazon
Dishwasher heating element
Check Price on Amazon
Thermistor temperature sensor
Check Price on Amazon
Wire nuts or electrical connectors
Check Price on Amazon
Dishwasher heating element
Check Price on Amazon
Thermistor temperature sensor
Check Price on Amazon
Wire nuts or electrical connectors
Check Price on Amazon
Dishwasher heating element
Check Price on Amazon
Thermistor temperature sensor
Check Price on Amazon
Wire nuts or electrical connectors
Check Price on Amazon
Dishwasher heating element
Check Price on Amazon
Thermistor temperature sensor
Check Price on Amazon
Wire nuts or electrical connectors
Check Price on Amazon
Dishwasher heating element
Check Price on Amazon
Thermistor temperature sensor
Check Price on Amazon
Wire nuts or electrical connectors
Check Price on Amazon
Dishwasher heating element
Check Price on Amazon
Thermistor temperature sensor
Check Price on Amazon
Wire nuts or electrical connectors
Check Price on Amazon
Dishwasher heating element
Check Price on Amazon
Thermistor temperature sensor
Check Price on Amazon
Wire nuts or electrical connectors
Check Price on Amazon
Dishwasher heating element
Check Price on Amazon
Thermistor temperature sensor
Check Price on Amazon
Wire nuts or electrical connectors
Check Price on Amazon
Dishwasher heating element
Check Price on Amazon
Thermistor temperature sensor
Check Price on Amazon
Wire nuts or electrical connectors
Check Price on Amazon
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When to Call a Professional

Call a professional appliance technician if you're uncomfortable working with electrical components, if multiple components test faulty simultaneously, if the control board appears damaged, or if the error persists after replacing both the heating element and thermistor.

Frequently Asked Questions

Why does my LG dishwasher show HE error code?
The HE error code indicates your dishwasher's heating system has failed. This means the water isn't reaching the proper temperature for effective cleaning, usually due to a bad heating element or thermistor sensor.
Can I still use my dishwasher with HE error?
While the dishwasher may still run, dishes won't get properly cleaned or sanitized without hot water. It's best to fix the heating issue before using the dishwasher to ensure proper cleaning and avoid potential bacterial growth.
How much does it cost to fix LG dishwasher HE error?
DIY repair costs range from $30-80 for a heating element or $15-25 for a thermistor. Professional repair typically costs $150-300 including parts and labor, depending on which component needs replacement.
How long do LG dishwasher heating elements last?
LG dishwasher heating elements typically last 8-12 years with normal use. Hard water, frequent heavy-duty cycles, and mineral buildup can reduce their lifespan significantly.
Will the HE error clear automatically after repair?
Yes, the HE error code should automatically clear once you've successfully replaced the faulty heating component and the dishwasher completes a normal heating cycle during operation.