LG Dishwasher HE Error: Heater Error
LG dishwasher error — here’s what you need to know. The HE error code on your LG dishwasher indicates a heating system fault — the water is not reaching the required wash temperature. This is a Medium severity issue. What Does HE Mean on an LG Dishwasher? HE stands for “Heater Error.” During a wash […]
~50%
DIY Fixable
From $145
Typical Repair Cost
1 – 2 hrs
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Maybe. The dishwasher will still run cycles but dishes will not be sanitized and detergent performance is reduced. Safe to use temporarily, but resolve the HE code before relying on it for heavy loads or baby items.
Can I reset the code?
Yes. Resetting the dishwasher may clear HE temporarily, but if the root cause (failed element or thermistor) is not fixed, the code will return during the next heated cycle.
When to stop immediately?
Stop if you notice: The interior of the dishwasher smells of burning plastic during the cycle., HE is paired with other error codes suggesting multiple component failures..
Symptoms You May Notice
Dishes Come Out Cold, Greasy, or with Detergent Residue
Without adequate heat, dishwasher detergent does not activate fully, leaving a greasy or powdery film on dishes and glassware.
HE Code on Display
The control panel shows HE, typically during the main wash or rinse phase when the heater is supposed to be active.
No Steam When Opening Door After Cycle
There is no visible steam or warmth from the tub when the door is opened at the end of what should be a heated wash cycle.
Inconsistent temperature performance
The dishwasher runs too hot, too cold, or cycles erratically because the control board receives inaccurate temperature readings from the faulty sensor.
Possible Causes
Failed Heating Element
The stainless steel or exposed coil heating element at the base of the tub has burnt open and can no longer generate heat.
Requires ProfessionalDefective Thermistor (Temperature Sensor)
The thermistor that reports water temperature to the control board has drifted out of range or failed, causing the board to incorrectly log a heating fault.
Requires ProfessionalControl Board Relay Failure
The relay on the main control board that energizes the heating element has welded open, so the element never receives power even though it is in good condition.
Requires ProfessionalSafe Checks You Can Do
-
1
Run a Hot Water Flush Before Starting a Cycle
Run the kitchen hot water tap until the water is hot to the touch before starting the dishwasher. This ensures the first fill isn't cold water sitting in the supply line, which can delay heating and trigger HE on some models.
-
2
Visually Inspect the Heating Element
With the dishwasher off and unplugged, remove the lower rack and visually inspect the element at the tub floor. Look for visible cracks, burn marks, or a broken loop in the element. A damaged element must be replaced.
-
3
Reset and Test on a Heated Cycle
Reset the dishwasher via the breaker. Run a cycle with the Heavy or Sanitize setting, which actively calls for more heat. Monitor whether the code returns and whether the interior feels warm mid-cycle.
When to Call a Professional
Contact a qualified technician if:
- Heating element tests open circuit (no continuity) on a multimeter.
- Thermistor resistance reading is far outside the expected range at room temperature.
- Control board relay for heater circuit is not closing when measured during a cycle.
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
Dishwasher Repair Service Schedule Appointment