If step 1 and 2 fails then you can try connecting lg thinq app to your refrigerator.
Lg ac window unit clean filter light.
Check the air filter every two weeks and clean it as necessary.
Shake the excess water from the filter before putting it back in.
Pull the filter straight up to remove it from the air conditioner.
Press reset filter to turn off the led and reset the accumulated run time.
Wash the filter using lukewarm water below 104 f 40 c.
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.
It should reset and your problem should be solved the filter warning should be reset.
This is to provide a reminder to clean the filter.
Rinse the filter under lukewarm running water until clean.