My AC started to blow out pretty lukewarm air recently, as well as make watery sounds while running. I realized the filter was dirty, and I cleaned the coils, replaced the filter and removed lots of water from the drip pan. I was able to get an improvement in cold air and no watery noise. However, after about 6 hours of use, I started to hear the watery sounds again and noticed the drip pan was full. I imagine the drainage in the unit is clogged. Unfortunately, I live on the 7th floor of a building, so taking the unit out can be quite cumbersome. Are there any methods to fix the problem? Would pouring some bleach into the pan do the trick?
Update: I drained the drainage pan again and saw that the AC unit was regurgitating water.