LG Dryer Error Code tC

The tC code means the thermistor1 temperature sensor is producing a resistance value that is either too low or too high for the control board to accept as valid. This sensor monitors heat levels during the drying cycle, and an out-of-range reading causes the dryer to display the fault. The problem can stem from restricted airflow, a failed sensor, damaged wiring, or in rare cases a faulty control board.

It is not recommended to continue operating the dryer while the tC fault is active. An out-of-range thermistor reading means the dryer cannot accurately monitor its internal temperature, which could lead to overheating. Running the dryer with an active airflow restriction also increases the risk of a lint fire. Resolve the fault before resuming normal use.

Unplugging the dryer for a few minutes may temporarily clear the tC code, but if the underlying problem is not resolved the code will return once the dryer runs again. A reset is useful for confirming whether the fault is intermittent, but it is not a fix. Address the root cause, whether that is a clogged vent, a failed thermistor, or a wiring issue, before relying on normal operation.

Yes, many tC errors are resolved by cleaning the lint screen and clearing a blocked exhaust vent, both of which are straightforward DIY tasks. If airflow is not the issue, a homeowner comfortable with basic multimeter use can test the thermistor resistance and inspect the wiring harness. Thermistor replacement is generally a manageable repair, but if the control board is at fault, many homeowners prefer to have a technician handle it.

If the fix is simply cleaning the lint screen or vent duct, the cost is minimal, typically just your time. Replacing a faulty thermistor usually involves a parts cost in the range of $15 to $50, plus labor if a technician performs the repair, bringing the total to roughly $75 to $175. A control board replacement is significantly more expensive, often ranging from $150 to $350 or more depending on the specific model.