LG Washer Error Code tC1

The tC1 code on an LG washer indicates a temperature sensor error related to the washing heater sensor located in the tub. The control board has detected either a contact fault, a disconnected or incorrectly installed connector, or an extreme temperature reading between 100 and 150 degrees Celsius. The machine shuts down to prevent damage from overheating. This can involve the sensor itself, the wiring connector, or the water level sensor failing to detect low water before the heater activates.

A power reset, such as unplugging the washer for a few minutes, may temporarily clear the tC1 code, but the error will return if the underlying fault is not corrected. If the cause is a loose connector, reseating it before resetting may resolve the issue permanently. If the sensor or water level sensor is faulty, the code will continue to appear until the defective part is replaced.

Repair costs depend on what part has failed. If the fix is simply reseating a loose connector, there may be no parts cost at all, though a service call from a technician typically runs between 75 and 150 dollars. Replacing a temperature sensor generally adds 20 to 60 dollars in parts, while a water level sensor replacement can range from 25 to 80 dollars in parts. Total repair costs including labor can range from 100 to 300 dollars depending on the fault and your location.

In some cases, yes. Start by unplugging the washer and checking the connector for the washing heater temperature sensor to make sure it is firmly and correctly seated. If the connector looks intact and undamaged, the repair becomes more involved and may require testing the sensor resistance and inspecting the water level sensor, which is work that benefits from some appliance repair experience. If you are not comfortable working with electrical components inside the machine, a technician should handle it.

No, you should not continue using the washer until the tC1 error is diagnosed and resolved. The code can indicate that the heating element activated without adequate water in the tub, which can cause internal temperatures to reach 100 to 150 degrees Celsius. Running the machine in this condition risks damage to the heater assembly, drum, and other internal components.