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How to Understand and Fix the LG Dishwasher HE Error Code
If you are standing in front of your LG dishwasher and the dreaded “HE” error code flashes on the display, then you are not alone. While this can be quite frustrating and may disrupt your routine of washing dishes, the good news is that the “HE” error code is relatively common and often can be fixed without calling in a repair technician. The post will help you understand what “HE” stands for in error code terms, why it appears, and how to troubleshoot it so you can get your dishwasher back into working order.
What Does HE Error Code Mean on an LG Dishwasher?
The “HE” error code on an LG dishwasher indicates some heating error. In essence, the dishwasher is not able to heat the water up to the proper temperature it requires during the cycle. The heating element is important for properly cleaning and sanitizing your dishes, so fixing this problem will be fundamental in restoring functionality to your dishwasher.

Common Causes of the HE Error Code
Several causes may lead to the appearance of the “HE” error. Identifying the root cause is the first step toward resolving the issue. Here are the most common culprits:
Faulty Heating Element
The heating element might have burned out or been damaged, thus not warming the water enough.
Thermistor Issues
It shall monitor the water temperature through a thermistor. In the event this thermistor is not performing well, it will fail to send appropriate temperature signals to the control board.
Wiring or Connection Problems
Decayed or loose wiring/connections internally between the control board and the heating element will hamper communication and cause the error code.
Clogged or Low Water Levels
If water is not filling the dishwasher appropriately, it means the heating element will lack water to heat. Sometimes a clogged inlet water valve or low water pressure may be an issue.
Control Board Failure
Rarely does the dishwasher have a faulty control board that develops a fault for heating-related failures.
How to Troubleshoot the HE Error Code
Before calling for professional help, there are a few simple troubleshooting steps you can try to try and resolve the issue.
Step 1. Restart Your Dishwasher
Sometimes, the easiest thing works the best. Switch off your dishwasher and unplug it from the power supply. Wait 10-15 minutes and then plug it in again. Restart the cycle. If the error code persists, move on to the next steps.
Step 2. Check the Water Supply
Check That Your Dishwasher Has Adequate Water Supply: The water supply valve shall be opened. Inlet hose should not be kinked and should not be clogged or damaged. Water pressure into the dishwasher must be appropriate. Inadequate amount of water during the wash would hinder the process of heating.
Step 3. Thermistor and Heating Element Check
For those comfortable with DIY repairs, you can try using a multimeter to test the resistance in the heating element and thermistor:
- Heating Element: Take the element out of the circuit and check with your multimeter. A bad element will not read the proper resistance or will not show continuity.
- Thermistor: Check the resistance to see if it reads correctly for proper temperature readings.
Either one of these could be bad and would most likely need replacement.
Step 4. Check Wires or Connections
Check wiring between the control board and the heating element for loose, corroded, or broken connections, and repair/replace the affected wires to ensure communication.
Step 5. Diagnostic Cycle
Most models of LG dishwashers have an inbuilt diagnostic mode. Use your user manual for directions on how to conduct a diagnosis to identify problems. This can confirm whether the error is related to the heating element or another component.
Step 6. Inspect and Clean Related Components
- Clean the water inlet valve and filters to ensure there is no blockage.
- Check that your dishwasher is level, as improper leveling can lead to water pooling issues affecting the heating process.

When to Call a Professional
If you’ve tried the steps above and the “HE” error persists, it’s time to call a certified technician. Issues such as a faulty control board or complex wiring problems are best handled by a professional.
Tips to Avoid Future HE Errors
Maintaining your dishwasher can help prevent issues like the “HE” error code from recurring. Here are some tips to keep your appliance running smoothly:
- Regularly clean the dishwasher’s filter and spray arms to prevent clogs.
- Avoid overloading the dishwasher, which can strain its components.
- Conduct periodic checks of the water inlet valve and hoses.
- Use high-quality detergents and avoid hard water buildup by using a dishwasher cleaner when necessary.
Final Thoughts
Although the “HE” error code can be a good reason to get your routine out of order with your LG dishwasher, it does not have to be permanent. By understanding the causes and going through the troubleshooting steps above, you increase your chances of fixing the issue yourself without an expensive repair bill.
If this is still out of your grasp, don’t hesitate to reach out to an appliance technician. Remember, prevention is the best medicine, so routine maintenance is the key to preventing future occurrences and keeping your dishwasher running effectively.