LG · Dishwasher

HE

Heater Element Error

Severity

Medium

The error code HE on your LG Dishwasher indicates a specific system failure categorized as "Heater Element Error". This guide walks you through the most likely causes and the correct repair sequence.

Owner's Summary

Your LG dishwasher's heater has failed. Dishes washed in cold water will not be sanitized properly and plastics may not dry well since LG uses heat to aid drying. The heating element is the most common cause.

Symptoms

LG dishwasher not heating water, dishes not drying, HE code displayed

Common Causes

Failed heating element
Defective thermistor
Burned heater relay on PCB
Open circuit in heater wiring

How to Fix

1 Test heating element continuity — replace if open circuit
2 Test thermistor resistance
3 Inspect heater wiring for burns or disconnections
4 Replace PCB heater relay if element tests good

Tools You'll Need

Multimeter Flashlight

These are simple, low-risk fixes most homeowners can do with tools already in a basic toolbox.

Technical Explanation

The PCB enables the heater relay to raise wash temperature to the program setpoint. The thermistor provides continuous feedback. HE is triggered when the expected temperature rise does not occur within the allotted time — indicating heater failure, thermistor failure, or relay fault.

Is It Safe to Keep Using?

No safety risk. Fix within a week.

Technician's Pro Tip

LG dishwasher heating elements are at the bottom of the tub. Before replacing, check that the element connectors at the rear wall of the tub are firmly seated — vibration can cause them to back out slightly, creating an intermittent open circuit.

Related Codes

OE — LG Washing Machine

Drain Error — Outlet Error

High

IE — LG Washing Machine

Inlet Error — Water Not Filling

High

LE — LG Washing Machine

Motor Error — Locked Motor

High

Frequently Asked Questions

What does error code HE mean on a LG Dishwasher?

Code HE on a LG Dishwasher indicates "Heater Element Error." In practice, the most common trigger is failed heating element. Severity is rated medium, and typical repair costs range from $20 to $280.

Can I fix HE myself, or do I need a technician?

Many cases of HE can be resolved without a technician. The first step to try: test heating element continuity — replace if open circuit. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my dishwasher with code HE showing?

No safety risk. Fix within a week.

How much does it cost to repair HE on a LG Dishwasher?

Repair costs for code HE typically range from $20 to $280. Heating element: $40–$120; Thermistor: $20–$50; PCB: $100–$280. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$20 – $280

Heating element: $40–$120; Thermistor: $20–$50; PCB: $100–$280