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Appliance Error Codes

What Does HE Error Mean on LG LDFC2423W?

Error HE on LG LDFC2423W: Water heating failure - water not reaching target temperature. Follow the troubleshooting steps below to diagnose and fix this dishwasher issue. The HE error code on your LG LDFC2423W dishwasher indicates a water heating failure. The dishwasher has detected that the water is either not heating to the required temperature or has overheated above safe limits (149°F). This error typically requires professional service. As an initial step, try running hot water at the kitchen sink before starting a cycle to ensure the dishwasher receives warm water from the supply line. ## What Does HE Mean? The HE error code stands for “Heater Error” and signals that the LG LDFC2423W has detected an abnormal condition in its water heating system. The dishwasher heats water during wash and rinse cycles to improve cleaning performance and sanitization. When the temperature sensor reports that water has not reached the target temperature within the expected timeframe, or if it detects temperatures exceeding 149°F (65°C), the control board triggers the HE code. On the LDFC2423W, the heating system works in conjunction with the 1-Hour Wash and Dry cycle and LoDecibel quiet operation to deliver optimal cleaning results. The heating element is located in the base of the tub and is controlled by the main electronic control board based on readings from the temperature sensor (thermistor). A common cause of the HE error is simply receiving cold water from the household supply. If the hot water heater is far from the kitchen or has been depleted, the dishwasher may receive water that is too cold to heat efficiently within its normal operating parameters. In more serious cases, the HE error indicates a failed heating element, a malfunctioning thermistor, or a control board relay that has stuck in the on position, causing the heater to run continuously until it overheats. These conditions require diagnosis and repair by a qualified technician. ## Possible Causes 1. Household hot water supply depleted or water heater set too low, delivering cold water to the dishwasher 2. Heating element in the dishwasher tub base has failed or developed an open circuit 3. Temperature sensor (thermistor) providing inaccurate readings to the control board 4. Control board heater relay stuck in the on position, causing continuous heating and overheating 5. Wiring connection between the heating element and control board is loose or damaged 6. Water inlet temperature consistently below the minimum required for the heating system to reach target 7. Electronic control board failure preventing proper heater activation or monitoring ## Troubleshooting Steps | Step | Action | Expected Result | |------|--------|-----------------| | 1 | Run the hot water tap at the kitchen sink until the water is hot to the touch before starting the dishwasher | Hot water flows from the tap within 30 to 60 seconds | | 2 | Turn off the dishwasher circuit breaker for 60 seconds, then turn it back on to reset the control board | Display resets and error code clears on startup | | 3 | Start a new wash cycle immediately after running hot water at the sink | Dishwasher begins the cycle without displaying HE | | 4 | Monitor the dishwasher during the wash phase by feeling the outside of the door for warmth | Door feels warm to the touch during the main wash phase, indicating heating is occurring | If the HE error indicates overheating (water temperature above 149°F), LG strongly recommends disconnecting power immediately and contacting authorized service. Overheating can damage dishwasher components and may pose a burn risk when opening the door. ## When to Call a Technician Contact LG authorized service if: - Hot water is confirmed at the kitchen sink but the dishwasher still displays HE

  • The dishwasher door does not feel warm at any point during the wash cycle
  • You notice steam or unusually hot water when opening the door mid-cycle
  • The HE error appears on every cycle regardless of water temperature
  • A burning smell is detected from the dishwasher during operation Professional repair costs for HE issues typically range from $150 to $400 depending on the specific component that needs replacement and your service region. ## Frequently Asked Questions ### Does the HE error mean my dishes are not being sanitized? If the water is not reaching the required temperature, the dishwasher cannot effectively sanitize dishes. The HE error indicates the heating system is not functioning correctly, which means the hot water sanitization feature is compromised until the issue is resolved.
Section titled “Can I use my LDFC2423W dishwasher if the HE error appears occasionally? It is not recommended. While the dishwasher may complete some cycles, the HE error indicates an underlying issue with the heating system that will likely worsen over time. Running cycles without proper heating also results in poor cleaning and sanitization.”

Should I adjust my home water heater temperature? LG recommends a household water heater setting of 120°F (49°C) for optimal dishwasher performance. Setting it higher increases burn risk at faucets, while setting it lower forces the dishwasher heating element to work harder and may trigger the HE error.

Section titled “Should I adjust my home water heater temperature? LG recommends a household water heater setting of 120°F (49°C) for optimal dishwasher performance. Setting it higher increases burn risk at faucets, while setting it lower forces the dishwasher heating element to work harder and may trigger the HE error.”

Could a power surge cause the HE error? A power surge can potentially damage the control board relay that controls the heating element, leading to the HE error. If the error appeared after a power outage or surge, the control board may need inspection or replacement by a technician. Reference: LG official support documentation (lg.com/us/support) and authorized service guides ### Is it safe to keep using my LG LDFC2423W with error HE? If error HE does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the dishwasher with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error HE on a LG LDFC2423W? Repair costs for error HE on the LG LDFC2423W dishwasher depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a LG-authorized service provider for an accurate estimate based on your specific situation. ### What does error code HE mean on a LG dishwasher? Error code HE on LG dishwasher models indicates Water heating failure - water not reaching target temperature. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue.

Section titled “Could a power surge cause the HE error? A power surge can potentially damage the control board relay that controls the heating element, leading to the HE error. If the error appeared after a power outage or surge, the control board may need inspection or replacement by a technician. Reference: LG official support documentation (lg.com/us/support) and authorized service guides ### Is it safe to keep using my LG LDFC2423W with error HE? If error HE does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the dishwasher with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error HE on a LG LDFC2423W? Repair costs for error HE on the LG LDFC2423W dishwasher depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a LG-authorized service provider for an accurate estimate based on your specific situation. ### What does error code HE mean on a LG dishwasher? Error code HE on LG dishwasher models indicates Water heating failure - water not reaching target temperature. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue.”