LG Washer Error Code F1

The F1 code on an LG washer indicates a dry ignition detection fault during the drying cycle. The control board checks the drum temperature every 10 seconds, and if the temperature increases by more than 17 degrees between checks, the machine stops and displays F1. This is a protective measure to prevent overheating damage to the appliance or laundry.

You should not continue running the drying cycle while the F1 code is active, as the error indicates abnormal heating behavior that could pose a risk of overheating. The wash cycle may still be usable depending on your model, but the drying function should be avoided until the underlying cause is identified and resolved.

A reset may temporarily clear the F1 code and allow the machine to run again, but the error will almost certainly return if the underlying issue has not been fixed. Resetting is useful as a first step to confirm whether the fault is intermittent, but it is not a repair. Addressing airflow restrictions or faulty components is necessary to permanently resolve the code.

Start by cleaning the lint filter and checking that the exhaust vent or duct is clear and unobstructed. Reduce the load size if the drum was heavily packed, then restart the drying cycle to see if the error returns. If the code persists after addressing airflow, the temperature sensor or heating element may need to be tested and potentially replaced by a technician.

Repair costs depend on the root cause. Clearing a blocked vent or lint filter costs nothing beyond your time. Replacing a thermistor or temperature sensor typically runs between $50 and $150 including parts and labor. A heating element or control board replacement can range from $100 to $350 or more depending on parts availability and local labor rates.