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LG Dishwasher Error Code HE: Heater error
Applies to LG dishwashers that show HE on the display.
The water is not being heated.
What this code means
The dishwasher heats its fill water for washing and sanitizing. HE means the water supplied is not being heated — the heater circuit or its temperature sensing has failed.
The manufacturer's checks, in order
- Power-cycle the dishwasher at the breaker and run a hot cycle.
Heater faults are a professional repair — LG expects HE to need service once a power reset fails.
Parts involved in this fault
| Part | Why it is involved | Typical price | |
|---|---|---|---|
| Heating element | The element that heats the water; fails open-circuit with age and scale. | $40-$100 | Check priceaffiliate slot |
| Thermistor | The temperature sensor that works with the heater. | $10-$25 | Check priceaffiliate slot |
Related LG dishwasher codes
IE — Water inlet errorOE — Drain (water outlet) errorAE — Leak detected errorFE — Overfill errortE — Thermistor (temperature sensor) errorLE — Wash motor error
Source & provenance. The meaning, the checks and their order, and the service line on this page are restated from LG official — “How Do You Fix Common Dishwasher Problems?” (LG Story) and “LG Dishwasher — Understanding Error Codes” (Help Library) (source), read on 2026-11-06. No forum content, no invented repair steps, and nothing involving gas, refrigerant or mains wiring. Where the manufacturer says to request service, this page stops too.