Warning: Disconnect power before servicing.
ErrBase

LG Dishwasher HE Error Code: Heater Fault

Quick Answer

HE on an LG dishwasher points to either the heating element or the NTC thermistor (temperature sensor). The thermistor is the cheaper and easier part to test first. At room temperature, a healthy LG NTC thermistor reads around 10-50k ohms depending on ambient temperature.

HE on an LG dishwasher points to either the heating element or the NTC thermistor (temperature sensor). The thermistor is the cheaper and easier part to test first. At room temperature, a healthy LG NTC thermistor reads around 10-50k ohms depending on ambient temperature. If the thermistor tests out of range, replace it before pulling the heating element. If the thermistor is fine, test the heating element resistance directly; a failed element will read OL.

LgDishwasherSeverity: highDifficulty: intermediate84% DIY Success
Time to Fix
30–90 min
Difficulty
intermediate
Parts Cost
$12 – $70
Tools Needed
Multimeter, Flathead screwdriver

What Does the HE Code Mean?

HE is a heater circuit fault. Test the NTC thermistor first (10-50k ohms at room temp) before condemning the heating element. The thermistor is a $12-22 part versus $40-70 for the element.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

NTC thermistor failed (out of range resistance reading)40%
Heating element winding failed open circuit24%
Main control board heater relay failure22%
Wiring harness connector loose or corroded at heater14%

Symptoms You May Notice

  • HE displayed during or after wash cycle
  • Water in tub is not hot at end of cycle
  • Dishes come out cold or with poor cleaning performance
  • Sanitize cycle fails or aborts with HE code

Can you reset a Lg dishwasher to clear the HE code?

After replacing the faulty component, unplug for 60 seconds and restart. Run a full cycle with the Sanitize option to confirm the heating element reaches temperature and HE does not return. If HE persists after replacing both thermistor and element, the control board heater relay may have failed.

Tools Required for Diagnosis

MultimeterFlathead screwdriverTorx T20 screwdriver

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Disconnect power

Disconnect power. Let the dishwasher cool to room temperature for at least 30 minutes. Access the thermistor -- it is typically clipped onto the heating element or the sump assembly. Disconnect the thermistor connector and measure resistance across its terminals with a multimeter.

2

With power still disconnected

3

Inspect the wiring harness connectors at both the thermistor and

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
Thermistor (NTC Sensor)EAF63615501 · $12–$22
Heater AssemblyEAU60933501 · $40–$70

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $41 (Parts) vs $700 (New Machine)

Frequently Asked Questions

Why should I test the thermistor before the heating element on LG HE?
The thermistor at $12-22 is significantly cheaper and easier to access than the heating element at $40-70. A thermistor reading OL gives the same HE code as a failed heating element. Testing the thermistor first prevents spending money on a heating element when the real fault is a $15 sensor.

Related Lg Dishwasher Error Codes

Code: E1LG Dishwasher E1 Error Code: Temperature Sensor FaultCode: LELG Dishwasher LE Error Code: Motor LockedCode: OELG Dishwasher OE Error Code: Drain Fault

Same Fix Works on These Brands

Lg shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience HE Errors

This repair applies to most Lg dishwashers with this error code. Common model numbers include:

LDFN4542D, LDF5545ST, LDFS5788S, LDP6763ST, LDFN3432T, LDFN4542S, LDFN4542W

Last verified for technical accuracy on March 14, 2026