LG Dryer Error Code tC5

The tC5 code means the dryer's control board has detected that Thermistor2, the second temperature sensor, is reading a resistance level that is either too low or too high to be valid. This prevents the dryer from accurately monitoring internal temperature. The issue can be caused by restricted airflow, a failed sensor, or a wiring problem.

It is not recommended to operate the dryer while the tC5 fault is active. The code indicates the dryer cannot accurately read its internal temperature, which means it cannot properly protect against overheating. Running the dryer in this condition could create a fire hazard, especially if the root cause is a blocked vent or lint screen.

A power reset by unplugging the dryer for a few minutes may temporarily clear the code, but it will return if the underlying problem is not resolved. If a clogged vent or lint screen was the cause and you have since cleared the blockage, the reset may hold. For a failed thermistor or damaged wiring, the code will reappear as soon as the dryer attempts to run a cycle.

Yes, in many cases. Start by cleaning the lint screen thoroughly and inspecting the exhaust vent duct for blockages or kinks, as airflow restrictions are the most frequent trigger. If airflow is clear, a technician-level repair involves testing the thermistor with a multimeter and replacing it if it reads an open or short circuit. Wiring connector inspection is also a straightforward check that most handy homeowners can perform.

If the fix is simply cleaning a clogged lint screen or vent duct, there is no parts cost, only your time. Replacing a failed thermistor typically costs between $15 and $60 for the part, plus labor if you hire a technician, which can bring the total to $100 to $200 depending on your area. A control board replacement, if needed, is significantly more expensive, generally ranging from $150 to $350 or more for parts and labor.