LG Washer Error Code tS2

The tS2 code on an LG washer indicates an open or short circuit error in the dryer compressor discharge pipe thermistor. This sensor monitors refrigerant line temperature in the heat pump drying system of LG combo units. The fault means the control board is receiving an invalid signal from that thermistor and has halted operation to protect the compressor.

You should not attempt to run the dryer function while the tS2 error is active, as the control board cannot monitor compressor discharge temperature and could allow the compressor to overheat. The wash cycle may still be available depending on the model, but continuing to use any affected function risks damage to the heat pump compressor, which is a costly component to replace.

Unplugging the unit for a few minutes and restarting may temporarily clear the tS2 code, but the fault will return if the underlying problem has not been resolved. A reset is only useful as a first check to confirm the error is repeatable. Proper diagnosis of the thermistor connector, wiring, and sensor resistance is necessary to permanently clear this code.

A homeowner comfortable with basic electrical testing can start by checking the thermistor connector for looseness or corrosion, which is the first recommended diagnostic step. If the connector is secure, testing the thermistor resistance with a multimeter against the 239k ohm specification at 25 degrees Celsius will confirm whether the sensor has failed. Wiring harness repairs and thermistor replacement are within reach for a skilled DIYer, but control board replacement is typically better left to a technician.

If the fix is simply reseating a loose connector, there is no parts cost and only your time is involved. A replacement discharge pipe thermistor typically costs in the range of 20 to 60 dollars for the part alone. If a control board replacement turns out to be necessary, parts and labor combined can range from 200 to 500 dollars or more depending on the specific model and your location.