The tE error code on your LG dishwasher indicates a problem with the heating system, particularly the temperature sensor (thermistor).
This guide will help you troubleshoot the issue.
Possible Causes of the tE Error Code on Your LG Dishwasher
- Faulty thermistor wire harness connector
- Faulty thermistor
- Faulty main control board (PCB)
Troubleshooting Steps for the tE Error Code:
- Hot Water Temperature:
- Before proceeding, check the temperature of your incoming hot water. If it’s consistently above 194°F (90°C), you’ll need to adjust your hot water heater to a lower temperature. Using excessively hot water can cause the dishwasher to overheat.
- Thermistor Wire Harness:
- Turn off the dishwasher and unplug it from the power outlet for safety.
- Locate the thermistor wire harness connection at the main control board (PCB). It’s usually a small connector with wires leading to the thermistor.
- Visually inspect the connector for any loose connections or damaged wires. If you find any issues, you may need to repair or replace the wire harness.
- Thermistor Testing:
Warning: This step requires a multimeter and some electrical knowledge.
- With the dishwasher still unplugged, use a multimeter to measure the voltage across the thermistor connection at the PCB.
- If you get a reading of 0 volts DC (VDC), the thermistor might be shorted.
- If you get a reading of 5 VDC, the thermistor or wiring harness could be open, or the thermistor might be unplugged.
- Thermistor Resistance:
- The thermistor resistance at 25 °C (77 °F) is approximately 11.8 KΩ. This value can be used as a reference when checking the thermistor directly at the PCB.
- Heater Assembly:
- Checking the heater assembly resistance is another advanced troubleshooting step. It involves measuring the resistance across the heating element terminals. The normal resistance for an LG dishwasher heater element typically ranges from ~12–30 Ω.
- Main Control Board:
- A faulty main control board can also cause the tE error. However, this is less common.
By following these steps, you can identify the source of the tE error code and potentially fix your LG dishwasher without needing to call a technician.
I am a master Appliance Repair technician with over 35 years of experience in the field. I am passionate about helping people troubleshoot their appliances and fix common problems. My website, appliancemode.com, provides a wealth of information on troubleshooting common appliance issues and deciphering error codes. This website aims to empower people to tackle appliance repairs themselves and save money on service calls.
