LG Washer Error Code TC

TC on an LG washer stands for a temperature sensor check fault related to the washing heater sensor located in the tub. The control board has detected an abnormal or absent signal from this sensor, which could indicate a disconnected connector, a connector that is incorrectly installed, or a failed sensor. The washer stops operation to prevent potential issues from running a cycle without proper temperature monitoring.

It is not recommended to continue running the washer while TC is active. The code means the control board cannot reliably read tub water temperature, which could lead to improper heating behavior during wash cycles. Running the machine without a functioning temperature sensor could result in overheating the water or incorrect cycle performance.

If the fix is simply reconnecting or reseating a loose connector, there may be no parts cost involved, though a service call from a technician could run anywhere from $75 to $150 depending on your area. If the temperature sensor itself needs to be replaced, parts and labor combined typically range from $100 to $250. Diagnosing the connector first is always worthwhile since it is the most common and least expensive cause.

Start by unplugging the washer and locating the washing heater temperature sensor connector in the tub area. Check that the connector is fully seated, correctly oriented, and free from corrosion or bent pins. If the connection looks good, the sensor itself may need to be tested for proper continuity or replaced if found defective.

A reset may temporarily clear the TC code, but the error will return if the underlying cause is not addressed. If the fault is a loose connector, reseating it will resolve the issue. If the sensor itself is faulty, the code will reappear as soon as the washer attempts a cycle that requires temperature monitoring.