LG Dryer Error Code C1

The C1 code on an LG dryer indicates that the unit detected items inside the drum during the vent blockage test, or that the dry sensor encountered an error during that same test. The vent blockage test is a built-in diagnostic routine that checks for exhaust airflow restrictions and requires the drum to be empty to function correctly. If the drum is empty and the code persists, the moisture sensor bars or their wiring circuit are the likely source of the fault.

You should not ignore the C1 error because it relates to the vent blockage test, which is a safety diagnostic. A dryer that cannot complete this test may not reliably detect exhaust restrictions, which can lead to overheating or increased fire risk over time. Resolve the underlying cause before continuing regular use.

If the fix is simply cleaning the moisture sensor bars, there is no parts cost and the job takes only a few minutes. If the dry sensor assembly needs replacement, parts typically range from around 15 to 50 dollars depending on the specific model. Adding professional labor for diagnosis and replacement generally brings the total repair cost to somewhere between 100 and 200 dollars.

Start by removing all items from the drum and running the vent blockage test again with an empty drum. If C1 still appears, locate the moisture sensor bars inside the drum and clean them with rubbing alcohol to remove any residue buildup. If cleaning does not resolve it, inspect the sensor bars for physical damage and test the wiring circuit for continuity. A faulty sensor assembly will need to be replaced.

Resetting the dryer by unplugging it for a few minutes may temporarily clear the code, but it will return if the root cause is not addressed. If the error is triggered by items in the drum, removing them before the test will prevent recurrence. If the dry sensor or wiring is faulty, a reset alone will not fix the problem and the code will reappear during the next vent blockage test.