tE3
LG Dryer
Severity: ModerateWhat Does This Error Mean?
The tE3 error means the exhaust duct temperature sensor in your LG dryer has failed. This sensor monitors airflow temperature in the duct after it leaves the drum. Without this reading, the dryer stops to prevent overheating.
Affected Models
- DLGX3886V
- DLGX5681V
- DLE7300VE
- Most LG electric and gas dryers
Common Causes
- The exhaust duct thermistor has failed — burned out or disconnected
- The exhaust duct is severely blocked, causing extreme temperatures
- The thermistor connector has corroded from moisture exposure
- Lint buildup directly on the sensor is causing inaccurate readings
- The control board is misinterpreting the thermistor signal
How to Fix It
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Unplug the dryer and wait 10 minutes before doing anything.
A power reset clears temporary sensor faults.
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Disconnect the exhaust duct from the back of the dryer and clean it fully.
Lint in the duct is the most common cause of high exhaust temperatures that damage sensors.
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Check the external vent flap on the wall or roof.
A stuck or blocked vent flap traps hot air and can damage the exhaust duct sensor.
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Clean the lint filter and check the drum interior for lint accumulation.
Excessive lint anywhere in the airflow path raises temperatures abnormally.
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If tE3 returns after cleaning, call a technician to test the duct thermistor with a multimeter.
The sensor may need replacing — it's a quick and affordable repair.
When to Call a Professional
The duct thermistor is an inexpensive part — $15–$30. It's accessed from the rear panel, which is a moderate DIY job. A technician will charge $80–$180 for full replacement including labor. Always clean the exhaust duct before assuming the sensor is faulty.
Frequently Asked Questions
What is the difference between tE2 and tE3 on LG dryers?
tE2 monitors temperature right at the drum outlet. tE3 monitors temperature further down the exhaust duct. Both are thermistors in the same airflow path but at different positions.
Can a blocked duct cause the tE3 sensor to fail permanently?
Yes. Prolonged extreme heat from a blocked duct can permanently burn out the sensor. If tE3 appears shortly after a duct cleaning, the sensor may already be damaged.
How do I know if my exhaust duct is blocked enough to cause tE3?
Hold your hand near the external vent while the dryer runs. You should feel a strong, steady flow of warm air. Weak or no airflow means the duct is significantly blocked.