HE
LG Dishwasher
Severity: CriticalWhat Does This Error Mean?
The HE error means the heating element in your LG dishwasher is not working. The water cannot reach the right temperature for cleaning. This is usually a heater or thermistor failure.
Affected Models
- LDF5545ST
- LDT7808ST
- LDFN4542S
- Most LG dishwashers with digital displays
Common Causes
- Burned-out heating element at the bottom of the tub
- Faulty thermistor (temperature sensor) giving wrong readings
- Loose or damaged wiring connection to the heating element
- Main control board not sending power to the heater
- Calcium buildup on the heating element reducing its effectiveness
How to Fix It
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Turn off the dishwasher and unplug it from the wall outlet.
Never work on electrical components while the unit is powered.
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Wait 10 minutes, then plug it back in to perform a hard reset.
Sometimes a temporary sensor glitch triggers the HE error.
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Run a normal wash cycle with hot water from the kitchen faucet first.
Run hot water at the sink for 30 seconds before starting the dishwasher.
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Check if your home water heater is set to at least 120°F (49°C).
If the incoming water is too cold, the dishwasher heater works harder and may trigger the error.
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If the error persists after resetting, call a technician to test the heater and thermistor.
A multimeter test can confirm if the heating element has continuity.
When to Call a Professional
Heating element replacement involves working with electrical connections. This is best handled by a licensed appliance technician. Contact LG support or a certified repair service. Expect repair costs of $150–$300 for a heater replacement.
Frequently Asked Questions
Will my dishes still get clean with the HE error?
They may not be properly sanitized without hot water. Food and grease may not dissolve completely. Do not rely on the dishwasher until the heater is fixed.
Can I reset the HE error on my LG dishwasher?
Yes — unplug the dishwasher for 10 minutes and plug it back in. If the error was a temporary glitch, this may clear it. If it comes back during the next cycle, the heater or sensor needs repair.
How much does it cost to replace the heating element in an LG dishwasher?
The heating element part costs around $40–$80. Labor for the repair is typically $100–$200. Total cost is usually $150–$300. A thermistor replacement is usually cheaper at $80–$150 total.