What does the LG HE error code mean?
HE (Heater Error) indicates that the dishwasher’s heating element cannot raise the water temperature to the required level, or the NTC thermistor is returning an out-of-range reading. The machine will complete its cycle but the cleaning and drying results will be significantly degraded.
🔍 Symptoms
- Greasy dishes and poor wash quality despite a full hot cycle
- Glasses and cups have a milky white residue
- Zero steam visible when opening the door mid-cycle
- The drying cycle is completely ineffective
- Plastic containers are wet and cold after a full cycle
How to fix the LG HE error code
- Open the door mid-cycle (carefully) on a 65°C programme. Absence of steam confirms the heater is not working.
- Unplug the machine. On LG dishwashers, the heating element is typically a tubular element at the base of the tub, running around the sump area.
- Test the NTC thermistor — it should read approximately 10k ohms at 25°C. Replace if out of range.
- Test the heating element with a multimeter — a healthy element typically reads 20–35 ohms. Open circuit (no reading) means it has burned out and must be replaced.
- Inspect the wiring between the control board and the heater for any loose connectors or burn marks.
Frequently Asked Questions (FAQ)
Q: How long should the water in my LG dishwasher take to heat up?
A: On a standard 65°C programme, the water should reach temperature within approximately 20–30 minutes of the cycle starting. If you open the door after this and the interior is completely cold, the heater has failed.
Q: Can I replace the LG dishwasher heating element without a professional?
A: Yes, with moderate confidence. The element is accessed from inside the tub — the lower basket and sump cover are removed to reach it. Most elements are secured with a nut or clips that are removable with standard tools.
Q: Could a tripped circuit breaker cause HE on an LG dishwasher?
A: If the dishwasher is on a shared circuit that has partly tripped, it is possible the heater circuit loses power whilst the control board continues to run. Check your fuse box if you have any electrical concerns.
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