Samsung Dryer Error Code tCA

The tCA code means the control board has detected that Thermistor 5 is reading a resistance value that is either far too low or far too high to be valid. Thermistor 5 is one of the temperature sensors the dryer uses to monitor heat during operation. The fault typically points to a failed sensor, a broken wire, or a bad connector in the thermistor circuit. The dryer may stop operating normally until the underlying issue is corrected.

It is not advisable to continue using the dryer while this error is active. Thermistor 5 provides temperature data the control board uses to regulate heating, and a failed sensor could allow the dryer to overheat or operate outside safe temperature limits. Resolve the fault before running additional cycles.

If the thermistor itself needs replacement, the part typically costs in the range of $10 to $40 depending on the model. If a professional technician performs the diagnosis and repair, total service costs including labor generally fall in the range of $100 to $250. Wiring repairs, if that is the root cause, may cost less in parts but can vary depending on the extent of the damage.

A knowledgeable DIYer can diagnose and often repair this fault with basic tools. Start by unplugging the dryer, locating Thermistor 5, and using a multimeter to check the sensor's resistance and the continuity of its wiring. If the sensor is open or shorted, replacing it is a straightforward repair. If the wiring or connectors are the issue, those can often be repaired without purchasing any parts.

A power reset by unplugging the dryer for a few minutes may temporarily clear the code, but it will return if the underlying problem has not been fixed. The tCA fault is triggered by a hardware condition, specifically an out-of-range resistance reading from Thermistor 5. Replacing the faulty component or repairing the wiring is required for a permanent fix.