Understanding LG Dryer Error Code: tE3
The tE3 error on LG dryers generally indicates a temperature-sensor related fault — the dryer is detecting an abnormal signal from the temperature measurement circuit (thermistor/temperature sensor) or the circuit that reads temperature. This can occur because the thermistor itself has failed (open or short), wiring or connectors are loose or corroded, a related safety thermostat/thermal fuse has tripped, the main control board is malfunctioning, or extreme vent/airflow restrictions are causing abnormal temperatures that the sensor reports as an error.
Common user impacts when tE3 appears include longer drying times, loads that don’t reach the correct temperature (resulting in damp clothes), frequent cycle interruptions, and — in some cases — failure to heat at all. Because temperature sensors are part of the dryer’s safety and control systems, leaving the issue unaddressed can increase energy use, stress other components (like the heating element), and in rare cases raise safety concerns if overheating is not detected properly.
Common Causes
- Failing thermistor/temperature sensor (open, shorted, or out-of-spec resistance)
- Loose, burnt, corroded or disconnected wiring/connectors in the sensor circuit
- Faulty main control board (incorrect sensor reading handling)
- Blown thermal fuse or high-limit thermostat that affects temperature monitoring
- Restricted venting / severe lint build-up causing abnormal temperatures
- Damaged heating element creating uneven heating or short circuits
- Moisture or water intrusion causing sensor or connector failure
Troubleshooting Steps
- Safety first: Unplug the dryer (and turn gas off on gas models) before inspecting internal parts. Allow the dryer to cool.
- Clear basic airflow issues: Remove lint from the lint trap, clean the dryer vent and exterior vent hood. Poor airflow can cause temperature anomalies and false sensor errors.
- Power cycle and re-check: Unplug for 5 minutes, plug back in and run a test cycle or diagnostic mode (if available) to see if the code returns.
- Visual inspection: Open the dryer access panels and inspect the thermistor/temperature sensor area, wiring harness, and connectors for burns, corrosion, pinched wires, or loose plugs.
- Test the thermistor: Using a multimeter, measure the thermistor resistance at room temperature. Many LG thermistors are NTC-type (commonly ~10 kΩ at 25°C, but consult your model spec). If the sensor reads open/infinite or a short (near 0Ω) or is out of the expected range, replace it.
- Check continuity of thermal fuses/thermostats: Test the thermal fuse and high-limit thermostat for continuity. A blown thermal fuse can cause temperature monitoring issues and must be replaced if open.