LG Dryer Error Code Ct

The Ct code on an LG dryer indicates that the internal temperature was outside the acceptable range during the vent blockage test. The test checks whether the dryer is heating and venting properly, and it requires the drum to start at close to room temperature. If the dryer is too hot from a recent cycle or too cold from a low ambient environment, the test cannot produce a valid result and the Ct code appears.

The Ct code itself is not an immediate safety emergency, but it does indicate that the dryer could not confirm safe venting conditions. A blocked exhaust vent, which can trigger this code, is a legitimate fire and carbon monoxide hazard if left unaddressed. It is important to inspect the full vent path and resolve the underlying cause before continuing regular use of the dryer.

If the cause is simply temperature or a blocked vent, there is no parts cost involved, only the time to clean or inspect the vent system. If a faulty thermistor is the culprit, replacement parts typically range from $15 to $50 depending on the model. A heating element replacement, if needed, generally runs between $30 and $100 for parts, with additional labor costs if a technician is hired.

Start by letting the dryer sit unused at room temperature for at least 30 to 60 minutes, then run the vent blockage test again. If the code returns, inspect the lint screen and exhaust duct for blockages and clear any obstructions. If the error persists after resolving temperature and airflow issues, the thermistor or heating components may need to be tested and possibly replaced.

Unplugging the dryer for a few minutes may temporarily clear the code, but it will likely return the next time the vent blockage test runs if the underlying condition has not been corrected. The most reliable fix is to allow the dryer to reach room temperature and ensure the vent system is free of blockages before running the test again.