Samsung Washing Machine Error Code tC — Temperature Sensor Error
The tC error code means your Samsung washing machine has detected a problem with the water temperature sensor (thermistor). The control board cannot get an accurate temperature reading, so it stops the cycle to prevent overheating or running with incorrect water temperature. A power reset sometimes clears a one-time glitch. If the code persists, the thermistor or its wiring usually needs professional replacement. This is not a DIY-serviceable part on most models.
What the tC Code Means
The Samsung washing machine error code tC is a temperature sensor error that indicates the control board cannot get a valid reading from the water temperature sensor (also called a thermistor). The thermistor is a small component, typically mounted inside the washer's tub or attached to the heater assembly, that measures the water temperature during the wash and rinse cycles. When the control board reads a temperature value that is out of range, missing, or changing too rapidly, it triggers the tC code.
Samsung has used different labels for temperature sensor faults across model generations. The code tE appears on older models and means the same thing as tC. The code tE1 is a more specific variant that indicates a particular circuit in the thermistor has failed. All three codes point to the same component and have identical troubleshooting paths.
The tC code is a protective measure. Without an accurate temperature reading, the washer cannot safely heat water or verify that the water is not overheating. Running a hot wash cycle without temperature feedback could damage fabrics or, in extreme cases, create a scald risk. The washer stops to prevent this.
Because the thermistor is an internal component that requires partial disassembly to reach, tC is not a typical DIY repair. A power reset is the only safe step to try at home. If the code returns, a technician is needed.
Common Causes — Most Likely First
How to Fix the tC Error — Step by Step
Unplug the washer for 2 to 3 minutes
Disconnect the washing machine from the wall outlet and wait at least 2 full minutes. This gives the control board and all sensor circuits time to fully de-energize and reset. Plug the washer back in and try starting a cycle.
Select a cold water cycle
After resetting, choose a cycle that uses cold water only (no heating). If the washer completes a cold cycle without displaying tC, the thermistor may still be functional for cold washes, but the heater circuit or sensor connection may have an issue that appears only when the washer heats water. This narrows the problem for a technician.
Check that both supply hoses are connected correctly
On some Samsung models, cross-connected supply hoses (hot water to the cold inlet and vice versa) can cause unexpected temperature readings that trigger the tC code. Verify that the hot hose connects to the hot inlet and the cold hose connects to the cold inlet on the back of the washer.
If the code returns, the thermistor needs professional diagnosis
If tC reappears after a reset (even on a cold cycle), the thermistor has an internal fault or its wiring has a problem. The thermistor is mounted inside the washer tub or on the heater element and requires partial disassembly to access. A technician will test the sensor with a multimeter and replace it if the resistance reading is out of specification.
When to Call a Technician
The tC code points to a sensor or wiring fault that requires professional equipment to diagnose. Book a Samsung appliance repair appointment if:
- The tC code returns after a 2-minute power reset
- The code appears on every cycle, including cold-water-only cycles
- The washer heats water to the wrong temperature (clothes come out much hotter or colder than expected)
- The display shows tE or tE1 along with or instead of tC
- You notice a burning smell or see steam during a cycle that should be using cold water
How Promix Repairs Samsung Washing Machine tC Errors
When a Promix Appliance Repair technician arrives for a Samsung washing machine tC error, the first step is measuring the thermistor's resistance with a multimeter. A functioning thermistor produces a specific resistance value at room temperature (the exact value varies by model). If the reading is out of specification, open-circuit, or short-circuit, the thermistor is replaced. The technician also inspects the wiring harness between the sensor and the control board for damage or loose connections.
Thermistor replacement is a straightforward repair on most Samsung washers. The sensor is typically held in place by a clip or a single bolt inside the tub. Promix carries common Samsung washer and dryer repair parts on every service vehicle, so most tC repairs are completed in a single visit. If the control board is at fault (rare), the technician explains the repair and provides a quote before proceeding. All repairs include a warranty on parts and labor. A service call fee applies and is credited toward the repair if you choose to proceed. Call (781) 666-9565 to schedule.
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Frequently Asked Questions
Can I keep using my Samsung washing machine with error code tC?
Not safely on heated cycles. The tC code means the washer cannot verify the water temperature. Running a hot wash without accurate temperature feedback could overheat the water or damage fabrics. Some Samsung models will allow a cold-water cycle to complete, but the code will return on any cycle that involves heating. Schedule a repair to restore full functionality.
Will resetting my Samsung washing machine clear error code tC?
Unplugging the washer for 2 to 3 minutes and plugging it back in may clear the code if the cause was a temporary sensor glitch. If the thermistor has an internal fault or the wiring is damaged, the code will return as soon as the control board attempts to read the temperature. A reset is worth trying but is less likely to be a permanent fix for tC than for many other Samsung washer codes.
How long does it take to fix Samsung error code tC?
If a power reset resolves the issue, it takes about 5 minutes. If a technician needs to replace the thermistor, the repair typically takes 30 to 45 minutes on site. The sensor is usually accessible after removing a panel and is held in place by a clip or single bolt.
Is Samsung error code tC covered under warranty?
If your Samsung washer is still within the manufacturer's warranty period (typically one year for parts and labor) and the thermistor has failed due to a manufacturing defect, the repair should be covered. Check your warranty documentation or contact Samsung directly to verify coverage for your specific model.
What is the difference between Samsung error codes tC, tE, and tE1?
All three codes indicate a temperature sensor problem. Samsung has used different labels across model generations. Older models display tE, mid-range models show tC, and some models use tE1 for a specific circuit within the thermistor. The troubleshooting steps and the repair (thermistor replacement) are the same for all three codes.
Can I run my Samsung washer on cold only with a tC error?
On some Samsung models, a cold-water-only cycle may complete without triggering the tC code because the washer does not attempt to heat the water. However, this is a workaround, not a fix. The thermistor is still faulty, and the code will return on any cycle that involves heating. The sensor should be replaced to restore full operation and avoid unexpected behavior.