If step 1 and 2 fails then you can try connecting lg thinq app to your refrigerator.
Lg ac window unit clean filter light.
Pull the filter straight up to remove it from the air conditioner.
Shake the excess water from the filter before putting it back in.
Wash the filter using lukewarm water below 104 f 40 c.
Remove the air filter from the front grille by pulling the air filter up slightly.
Air conditioner reset filter light window room air conditioners with a reset filter pad with led will turn on when the fan has accumulated 250 hours of run time.
With the panel unlocked press and hold the air filter or water filter button for 3 to 5 seconds.
Rinse the filter under lukewarm running water until clean.
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.