Samsung Dryer Error Code tC5

The tC5 error code on a Samsung dryer indicates that Thermistor 2, commonly referred to as the vent thermistor, is reading resistance values that fall outside the acceptable operating range. The control board monitors this thermistor continuously to track exhaust air temperature at or near the vent outlet. When the resistance reading comes back either too low (suggesting a short circuit) or too high (suggesting an open circuit or broken sensor), the control board triggers tC5 to alert the user and halt normal operation. This thermistor plays a critical role in preventing overheating by giving the dryer accurate temperature data throughout the drying cycle.

The most common triggers for tC5 are airflow restrictions and thermistor wiring faults. A clogged lint screen or a blocked, kinked, or crushed exhaust duct can cause the vent thermistor to register extreme temperature readings, which the control board may interpret as a sensor fault. Beyond airflow problems, the thermistor itself can fail internally, causing its resistance to drift outside the expected range. Wiring issues such as corroded connectors, pinched harness wires, or a loose connection at the thermistor plug can also produce the out-of-range resistance readings that trigger this code.

Diagnosis should begin with a thorough inspection of the lint screen and the entire exhaust vent path for blockages or damage. If airflow is confirmed to be unrestricted and the code persists, the next step is to inspect the wiring harness and connector at Thermistor 2 for visible damage, corrosion, or loose pins. If wiring checks out, the thermistor itself likely needs replacement. Because this code involves both potential sensor failure and critical thermal safety monitoring, continued operation with an active tC5 code is not recommended.