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Source-backed error-code guide

Reviewed

LG Dishwasher HE Error Code

HE is mostly a service condition. LG documents a power reset attempt, but the code does not prove the heater itself has failed.

Applies to LG dishwasher

What the appliance detected

Detected condition

LG says HE indicates a heater error, including water not being heated or water overheated above the documented threshold.

What may contribute

Possible causes

  • The dishwasher was unable to heat water as expected.
  • The water temperature was detected as overheated.
  • A heater, sensing, wiring, or control condition may require service if the code returns.

Start conservatively

Safe preliminary checks

Work in order and stop whenever a step is not supported by the documentation for your model.

  1. Record the code and stop for heat or electrical hazards

    • Photograph or write down HE before resetting anything.
    • Stop for burning odor, smoke, sparking, unusual heat, visible damage, or water near electrical parts.

  2. Perform one documented power reset

    • Turn the dishwasher off with the Power button.
    • Turn the dishwasher circuit breaker off for 10 seconds, restore power, then start a new cycle only if there are no hazard signs.

  3. Preserve a returning code

    • If HE returns, stop and request service.
    • Do not continue resetting or using the dishwasher while a heater error continues.

Actions not recommended

  • Do not access the heater, wiring, control board, or internal temperature components.
  • Do not test live voltage or resistance, and do not replace parts based on HE alone.
  • Do not continue use if overheating, burning odor, smoke, or electrical warning signs are present.

When to stop and request service

  • Request service if HE persists or returns after one documented reset.
  • Stop immediately for heat, smoke, burning odor, sparking, visible damage, or water near electrical parts.
  • Use qualified service for any heater, sensor, wiring, or control inspection.

Documented source

Official information reviewed

Our summary is based on manufacturer support material and stays within the limits of that material.

Source reviewed by Appliance Help HQ: August 17, 2026.

Appliance Help HQ is an independent informational site and is not affiliated with or endorsed by LG.

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