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Samsung Washer tC4 Error Code: Causes and Fixes

Quick answer: On a Samsung Washer, the tC4 error code means a specific variant of the thermistor fault has been detected. Samsung Washer tC4 indicates that the temperature sensor reading is abnormal — specifically that the thermistor circuit is reading a value that cannot correspond to any valid temperature (open circuit or short circuit condition). tC4 typically means the thermistor has completely failed (open circuit showing infinite resistance) or that the wiring to the thermistor has broken.

Quick Fix for Samsung Washer tC4

Unplug the washer and wait 5 minutes.
Locate the thermistor — it is typically clipped to the heating element or the inner tub on the back of the machine.
Check the thermistor wiring connector — reconnect if loose.
Test the thermistor resistance with a multimeter: at room temperature (20°C/68°F), a working NTC thermistor should read approximately 10,000 ohms. An open circuit reading indicates failure.
Replace the thermistor if faulty.

Common Causes of Samsung Washer tC4

Open circuit thermistor: The thermistor element itself has failed, showing infinite resistance.
Broken thermistor wiring: The wires between the thermistor and control board have broken.
Corroded thermistor connector: Corrosion at the connector increases resistance and causes false readings.
Thermistor physically damaged: Impact during transport or installation has damaged the sensor.
Water ingress at connector: Moisture in the wiring connector causes erratic or failed readings.