LG Dryer tE Error Code — What It Means
The tE, tE1, or tE3 error code on an LG dryer indicates the control board has detected a problem with the thermistor or its circuit. The thermistor is the temperature sensor that tells the control board how hot the drum is getting. When the board receives an abnormal or unbelievable reading from that sensor, it throws this code and stops the cycle to protect the machine. This is not an overheat alarm by itself. It is a signal-quality fault, meaning the control cannot trust the temperature information it is receiving.
Common Causes
- Control glitch or transient fault A temporary control-board hiccup can trigger the code and will often clear after a simple power reset.
- Failed or out-of-spec thermistor The temperature sensor itself can drift out of range or fail completely, sending bad data to the control board.
- Loose or corroded connector Connections between the thermistor and control board can loosen or corrode, breaking the signal path.
- Restricted airflow from lint buildup Clogged lint screens, ducts, or exterior vents cause abnormal temperature swings that can confuse the sensor circuit.
- Main control board fault Less common, but the control board itself can misread a good thermistor signal and throw the error incorrectly.
Step-by-Step Fix
- Perform a power reset. Unplug the dryer or turn off the circuit breaker, wait 30 seconds, then restore power. LG recommends this as the first action because many tE faults clear with a simple reset.
- Check all airflow paths. Pull and clean the lint screen, vacuum out the lint housing behind it, inspect the transition duct for kinks or blockage, and confirm the exterior vent hood opens freely. Weak airflow is a common root cause of recurring temperature-sensor errors.
- Run a short timed-dry test. Start a timed cycle and watch for heat. If the dryer runs briefly then throws tE again, the control is rejecting the thermistor signal in real time rather than displaying a stale fault.
- Access and inspect the thermistor circuit. Unplug power, remove the lower front or rear panel (model-dependent), locate the thermistor on the blower housing or heater assembly, and check the sensor, harness, and connectors for damage, corrosion, or loose pins.
- Test the thermistor with a multimeter. Disconnect the sensor plug and measure resistance across the thermistor terminals. Field sources commonly report 10,000 to 11,700 ohms at room temperature, but consult your model’s service manual for the exact specification. Replace the thermistor if the reading is far out of range or open.
- Replace the thermistor if faulty. If the sensor tests bad or the wiring is intact and airflow is good, swap in a new thermistor and reconnect the harness securely.
- Evaluate the main control board if the fault persists. When the thermistor, harness, and airflow all check out but the code returns, the control board may be misinterpreting the signal. Board replacement is the final step in the diagnostic path.
Parts Often Needed
| Part | Notes |
|---|---|
| LG dryer thermistor / temperature sensor | Amazon | Match to your model number. Usually mounted on the blower housing or heater assembly. |
| Wiring harness or connector kit | Amazon | Order if pins are corroded or the plug is heat-damaged. |
| LG dryer main control board | Amazon | Required only if the sensor and wiring test good but the fault remains. Confirm your model before purchase. |
When to Call a Pro
Call a qualified appliance technician if you are not comfortable working with a multimeter, accessing internal panels, or interpreting resistance readings. If airflow is clear, the thermistor tests within range, and the fault still appears after a reset, the control board is the likely culprit and board-level diagnostics require experience. Also call if your dryer is still under warranty, since DIY repairs can void coverage.