Samsung Washer Error Code 1TC1

The 1TC1 code on a Samsung washer indicates a temperature sensor error on the upper washer's washing heater circuit. The control board is not receiving a valid signal from the sensor that monitors water temperature during heating. The machine stops the cycle to prevent potential overheating. Diagnosis starts with checking the sensor's wiring connector for a secure, clean connection.

It is not recommended to continue running wash cycles while the 1TC1 error is active. The control board uses the temperature sensor to regulate the heating element, and without a valid sensor reading, there is no reliable way for the machine to prevent overheating. Running the washer in this condition could damage internal components or create a safety hazard.

Performing a reset by unplugging the washer for a few minutes may temporarily clear the 1TC1 code, but the error will return if the underlying sensor fault has not been corrected. A reset is useful for confirming whether the fault is intermittent, but it does not repair a failed sensor, corroded connector, or damaged wire. The root cause must be diagnosed and corrected for the code to stay cleared.

A knowledgeable DIYer can attempt to resolve this by inspecting and reseating the washing heater temperature sensor connector, which requires no special tools. If the connector looks clean and secure, testing the sensor's resistance with a multimeter is the next step. Replacing the sensor is a moderately involved repair, and any work near the heating circuit should be done with the washer fully unplugged from power.

If the fix is simply reseating a loose connector, there is no parts cost involved. Replacing a faulty washing heater temperature sensor typically costs between $20 and $80 for the part, depending on the model. If professional labor is needed, total repair costs generally range from $100 to $250, depending on local service rates and whether additional components like the wiring harness also need replacement.