Editorial & technical review
- Written by ApplianceWorth Editorial Team
- Technically reviewed by Victor — appliance technician
- Last reviewed 2026-07-01
- Applies to LG dishwashers
- Confidence medium
- Sources Manufacturer service documentation and field-repair experience · Methodology · Report a correction
What this code means
The dishwasher was unable to heat the wash water normally or detected an excessive water temperature. HE can involve the heater, temperature sensor, wiring or control.
Most likely causes
- An open or failed heater circuit
- A thermistor or temperature-sensing problem
- Loose, overheated or damaged wiring
- A relay or main-control fault
Safe checks for the owner
- Turn the dishwasher off and reset the breaker for ten seconds.
- Verify that the household hot-water supply is not set to an unusually high temperature.
- Stop using the dishwasher if there is a burning smell, melted wiring odor or breaker trip.
Estimated U.S. repair cost
$350–$750, depending on model, access, parts availability and local labor.