LG Dryer Error Code tS2

The tS2 code means the control board has detected an open or short circuit condition in the compressor discharge pipe thermistor circuit. This sensor monitors the temperature of the refrigerant line leaving the compressor in the heat pump system. The dryer stops operating when this fault is present to prevent compressor damage. Diagnosis starts with checking the connector and measuring thermistor resistance, which should be 10kΩ ±1% at 25°C.

No, you should not continue using the dryer while the tS2 code is active. The fault indicates the compressor temperature monitoring system is not functioning correctly. Running the dryer without reliable temperature feedback from this sensor could lead to compressor overheating and more serious damage to the heat pump system.

Unplugging the dryer for a few minutes may temporarily clear the code, but it will return if the underlying fault is still present. The tS2 code reflects an active circuit fault in the thermistor wiring or sensor, so a reset is not a repair. The root cause must be identified and corrected before the error will clear permanently.

A homeowner comfortable with basic electrical testing can check the thermistor connector for secure seating and inspect the wiring harness for visible damage. Measuring thermistor resistance with a multimeter is also a straightforward step. However, if the thermistor or control board needs replacement, or if the heat pump refrigerant system is involved, a qualified technician should perform the repair.

Repair costs vary depending on the failed component. If only the thermistor connector needs reseating or cleaning, there may be no parts cost, though a service call typically runs between $75 and $150. A replacement thermistor sensor is generally in the $20 to $60 range for parts, while a control board replacement can bring total repair costs to $200 to $400 or more including labor.