LG Dryer Error Code tS

The tS code on an LG dryer indicates that the temperature sensor (thermistor) is detecting abnormal temperature readings due to restricted airflow. The most common cause is a clogged lint screen or a blocked exhaust vent, both of which cause heat to accumulate in the drum beyond normal levels. The dryer displays this code to alert you to a condition that could become a fire hazard if left unaddressed.

You should not continue running the dryer while the tS code is active. Restricted airflow causes excessive heat buildup inside the appliance, which is a known fire hazard. Stop using the dryer, clear the lint screen and vent path, and confirm the issue is resolved before running another cycle.

If the fix is simply cleaning the lint screen and vent duct, the cost is minimal, typically just your time or a professional vent cleaning service ranging from around $80 to $175. If the thermistor has failed and needs replacement, parts are generally in the $15 to $50 range, and a repair technician visit would add labor costs on top of that, typically bringing the total to somewhere between $100 and $250 depending on your location.

Start by cleaning the lint screen thoroughly and inspecting the exhaust vent duct from the dryer to the exterior of the home for blockages, kinks, or damage. Clear any lint buildup from inside the duct and make sure the exterior vent cap opens freely. If airflow is restored and the code still appears, test the thermistor resistance with a multimeter to determine if the sensor has failed and needs to be replaced.

A power reset may temporarily clear the tS code, but the code will return if the underlying cause has not been corrected. Simply unplugging the dryer or resetting the circuit breaker without addressing the lint or vent restriction will not solve the problem. Correct the airflow issue first, then the code should not reappear during normal operation.