Shake the excess water from the filter before putting it back in.
Lg ac window unit clean filter light.
Remove the air filter from the front grille by pulling the air filter up slightly.
This is to provide a reminder to clean the filter.
Check the air filter every two weeks and clean it as necessary.
Gently shake away excess water from the filter allow it to air dry and reinstall the filter.
It should reset and your problem should be solved the filter warning should be reset.
If step 1 and 2 fails then you can try connecting lg thinq app to your refrigerator.
Pull the filter straight up to remove it from the air conditioner.
With the panel unlocked press and hold the air filter or water filter button for 3 to 5 seconds.
Pull the inlet grille forward to gain access to the air filter.
Press reset filter to turn off the led and reset the accumulated run time.