The tE1 error means outlet thermistor (exhaust temperature sensor) fault — sensor reading out of range.
The LG dryer displays the tE1 error and halts the current cycle until the underlying problem is fixed.
Check these in order. The first cause accounts for the majority of tE1 errors.
The outlet thermistor measures exhaust air temperature. Over time it fails open-circuit (OL on multimeter), triggering tE1 immediately at start.
Moisture inside the dryer cabinet can corrode the thermistor connector. Inspect and clean the connector before replacing the thermistor.
If the exhaust duct is severely blocked, the outlet temperature can spike high enough to damage the thermistor. Always clear the duct before replacing the sensor.
If the thermistor tests good and the connector is clean but tE1 persists, the control board's thermistor input may have been damaged by a prior overheat event.
Follow these in order. Stop as soon as the error clears.
Cut power and disconnect from the wall outlet.
Use a dryer vent cleaning brush to clear lint from the entire duct run to the exterior cap. A blocked vent is often the root cause of thermistor damage.
The outlet thermistor is on the exhaust duct exit point inside the rear panel, typically a small cylindrical probe with two wires.
Remove the connector and check for green corrosion or bent pins. Clean with contact cleaner if needed.
At room temperature (~70°F / 21°C) a good LG dryer outlet thermistor reads approximately 10–15kΩ. OL or 0Ω = replace.
LG dryer thermistors are typically one screw and a connector (~$10–25). Run a short cycle to verify the fix.
For warranty service, contact LG support ↗ or a certified appliance technician.