LG Dryer Error Code tE3

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

1. Safety first: Unplug the dryer (and turn gas off on gas models) before inspecting internal parts. Allow the dryer to cool.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. Inspect heating element: Check the heating element for continuity and for signs of grounding to the cabinet. A failing element can cause unstable temperatures that trigger tE3.
8. Swap/connectors and retest: If wiring looks suspect (corrosion/burn), repair or replace the harness and connectors, and re-test. Ensure all connectors are seated firmly.
9. Firmware / control board: If sensors, wiring and fuses test good, the main control board may be misreading the sensor. Look for burnt components on the board; replacement or professional diagnosis may be required.
10. When in doubt, call a pro: If you’re not comfortable testing with a multimeter or working on gas/electrical components, call a certified appliance technician to diagnose and repair safely.

Maintenance / Prevention Tips

• Clean the lint trap after every load.
• Deep-clean the dryer vent and ductwork at least annually (more often for heavy use).
• Use a short, straight vent run and avoid crushed or flexible foil ducting when possible.
• Inspect the external vent hood for obstructions (birds’ nests, debris).
• Don’t overload the dryer — proper airflow through the drum prevents hot spots.
• Periodically vacuum lint from the blower housing and behind the lint trap area.
• Replace the vent hose with rigid or semi-rigid ducting for better airflow where local code allows.
• Keep the dryer in a dry location to prevent moisture damage to sensors and connectors.
• Use manufacturer-recommended parts when replacing thermistors, thermostats, or fuses.
• Inspect electrical connections when you open the dryer for any maintenance.
• Run a diagnostic check per your model’s service manual whenever you notice performance changes.
• Schedule professional maintenance if the dryer sees heavy or commercial-style use.
• Avoid stacking excessive loads or items that trap moisture (large wet rugs) in a single cycle.
• Replace old or brittle vent hoses before they fail or collapse.
• Keep the dryer’s interior clean of lint and dust buildup to protect sensors and electronics.

FAQs

Q: Is tE3 dangerous?

A: The code itself is a warning of a temperature-sensing problem. While not immediately dangerous, a faulty temperature sensor can impair the dryer’s safety controls and should be addressed promptly to avoid overheating or energy waste.

Q: Can I clear tE3 by just unplugging the dryer?

A: Power-cycling can sometimes clear transient errors, but if the underlying fault (bad sensor, wiring, or fuse) remains, the code will likely return. Use power cycling only as an initial step.

Q: How much does it cost to fix tE3?

A: Cost varies: replacing a thermistor or thermal fuse is generally inexpensive ($15–$80 parts alone); control board replacements and professional labor increase costs. Labor rates vary by region.

Q: Can I replace the thermistor myself?

A: If you are comfortable with basic electrical safety, removing panels, and using a multimeter, you can replace a thermistor yourself following the service manual. For gas dryers or complex issues, a professional is recommended.

Q: Will poor venting cause tE3?

A: Yes — severe vent restriction can create abnormal temperature readings or overheating that trigger temperature-related error codes. Always check venting and airflow during troubleshooting.

Conclusion and Safety Notice

tE3 typically points to a temperature sensing or circuitry issue. Address it promptly: start with airflow/vent cleaning and basic visual checks, then proceed to electrical testing if you’re qualified. Because temperature-sensor faults can affect safety features, do not ignore recurring errors.

If you are unsure, uncomfortable with electrical diagnosis, or if the dryer is a gas model, contact a qualified appliance repair technician. Professional service ensures safe repairs, correct parts, and peace of mind.