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Error code reference

Samsung Dryer Error Code tC

Thermistor 1 resistance is very low or very high, indicating a faulty cycling thermistor or wiring issue.

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Thermistor 1 resistance is very low or very high, indicating a faulty cycling thermistor or wiring issue.

First step from the service manual

Check for a clogged lint screen and check if the vent system is restricted. If the code remains, contact a Samsung customer service center.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What tC means on a Samsung dryer

The tC error code on a Samsung dryer indicates that Thermistor 1, commonly called the cycling thermistor, is reading a resistance value that falls outside the acceptable operating range. The control board continuously monitors the thermistor's resistance to track drum air temperature. When that resistance reads either far too low (suggesting a short) or far too high (suggesting an open circuit), the board interprets the signal as a faulty sensor and halts normal operation by displaying tC.

The cycling thermistor plays a central role in temperature regulation during a drying cycle. It signals the control board when the drum air has reached the target temperature, allowing the heating element or gas burner to cycle on and off appropriately. If the thermistor fails or its wiring is compromised, the dryer loses its ability to regulate heat accurately, which can lead to overheating or a failure to produce adequate heat at all.

Before assuming the thermistor itself has failed, it is important to check for airflow restrictions. A clogged lint screen or a blocked exhaust vent can cause abnormal temperature conditions that stress the thermistor circuit. If clearing the lint screen and verifying that the vent system is unobstructed does not resolve the tC code, the most likely culprits are a faulty thermistor, damaged wiring in the thermistor circuit, or a loose connector at the thermistor or control board. These conditions require further component-level inspection.

Source: manufacturer service documentation.

Common causes of tC

  1. 01

    Faulty cycling thermistor

    Part replacement

    The thermistor itself can fail internally, causing its resistance to fall outside the acceptable range. This is the most common hardware cause of tC and typically requires replacing the component.

  2. 02

    Damaged or disconnected wiring

    Wiring / connection

    Wires leading to the thermistor can become pinched, frayed, or corroded, causing resistance readings to spike or drop unexpectedly. Inspect the wiring harness and connectors at both the thermistor and the control board for visible damage or loose pins.

  3. 03

    Clogged lint screen or blocked exhaust vent

    Wiring / connection

    Restricted airflow causes heat to build up abnormally inside the drum, which can push the thermistor circuit into an out-of-range reading. Clean the lint screen and verify the full length of the exhaust duct is clear before diagnosing any components.

  4. 04

    Loose connector at the thermistor

    Wiring / connection

    Vibration from normal dryer operation can gradually loosen the electrical connector at the thermistor. A partially seated connector can produce intermittent or erratic resistance readings that trigger the tC code.

  5. 05

    Failed control board

    Part replacement

    If the thermistor and all associated wiring test within specification, the control board may be misreading the signal due to an internal fault. This is a less common cause but should be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about tC

What does tC mean on a Samsung dryer?
The tC code means the dryer's cycling thermistor, which is the sensor that monitors drum air temperature, is sending a resistance reading that is either far too low or far too high for the control board to interpret as valid. This indicates a problem with the thermistor itself, its wiring, or the connectors in that circuit. The dryer will not operate normally until the fault is resolved.
Can I fix the tC error myself?
Some steps are safe for a homeowner to perform, such as cleaning the lint screen and inspecting the exhaust vent for blockages. Checking and reseating wiring connectors is also manageable for a confident DIYer. However, testing component resistance, identifying damaged wiring inside the dryer cabinet, and replacing parts like the thermistor or control board are tasks best suited to a technician. Samsung recommends contacting a customer service center if the code persists after checking for airflow restrictions.
Is it safe to keep using my dryer when tC is displayed?
It is not advisable to continue running the dryer while the tC code is active. The cycling thermistor is responsible for preventing the dryer from overheating, and if it is not functioning correctly, the dryer cannot regulate temperature properly. Continued use could result in overheating, damage to clothing, or a more serious safety concern. Resolve the fault before resuming normal use.
Will resetting the dryer clear the tC error code?
A power reset, such as unplugging the dryer for a few minutes and plugging it back in, may temporarily clear the tC code, but the code will return if the underlying fault is still present. The thermistor circuit needs to be physically inspected and the problem corrected for the error to stay resolved. A reset alone does not repair a failed thermistor or damaged wiring.
How much does it cost to repair a tC error on a Samsung dryer?
Repair costs vary depending on the cause. If only the cycling thermistor needs to be replaced, parts and labor typically fall in the range of $75 to $200. If damaged wiring or a failed control board is involved, costs can increase to the range of $150 to $400 or more depending on the part and labor rates in your area. Getting a diagnostic assessment from a qualified technician before ordering parts is recommended.

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