Samsung Dishwasher Error Code tC1

The tC1 code means the drying duct temperature sensor is producing an AD value that is either 64920 or higher, or 615 or lower, both of which are outside the acceptable operating range. This indicates the sensor circuit has a fault such as an open circuit, short circuit, or a completely failed sensor. The dishwasher flags this code during operation when it detects the out-of-range reading.

The tC1 error is specifically related to the drying duct temperature sensor, so washing functions may still operate. However, running the dishwasher with a faulted drying system sensor is not recommended, as the control board cannot properly regulate drying temperatures without accurate sensor input. It is best to diagnose and resolve the fault before continuing regular use.

A power reset may temporarily clear the tC1 code, but the error will return if the underlying fault with the drying duct temperature sensor or its wiring has not been corrected. Resetting is useful for ruling out a temporary glitch, but persistent tC1 codes require physical inspection and testing of the sensor circuit to resolve the problem properly.

Some causes of the tC1 error are DIY-friendly, such as reseating a loose connector or cleaning corroded terminals. However, replacing the drying duct temperature sensor or inspecting the wiring harness requires disassembling parts of the dishwasher door or duct assembly, which may be more involved. If you are comfortable with basic appliance repair and have a multimeter, you can test the sensor and wiring before deciding whether to call a technician.

If only the drying duct temperature sensor needs replacement, parts typically cost in the range of $15 to $50 depending on the specific model. If a technician is needed for diagnosis and replacement, total repair costs including labor can range from $100 to $250. Control board replacement, if required, would increase that cost significantly.