- Turn the appliance off and allow it to cool fully.
- Check vents, airflow paths, filters, or load conditions that could have trapped heat.
- Restart once and confirm whether the code stays away under normal use.
Heater error; water not heated or overheated above 149°F. On the LG LDF7810WW, this code relates to the dishwasher and should be interpreted together with how the appliance is behaving right now.
- The dishwasher displays HE instead of normal status information.
- The current cycle, function, or startup sequence may stop, pause, or behave differently than expected.
- The same code may return after a reset if the underlying issue is still present.
- The appliance detected overheating, restricted airflow, or temperature outside the safe operating range.
- A sensor, fan, or cooling path issue can also trigger repeated thermal protection codes.
- Check whether the appliance was overfilled, badly ventilated, or placed in abnormal ambient conditions.
- Make sure cooling fans or airflow openings are not blocked by dust, packaging, or installation gaps.
- If the fault returns after cooling and airflow checks, a sensor or cooling component may need service.
- Do not keep forcing operation while thermal protection or overheat codes are active.
Arrange service if HE returns after the appliance cools and the airflow or load checks are complete.
Can HE clear after a reset?
Sometimes a temporary glitch clears after one full reset, but a repeated return usually means the same underlying issue is still there.
Should I keep using the appliance if it works again briefly?
Only if the code stays away and the appliance behaves normally. If the same code comes back, stop and move to service or more targeted diagnosis.