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.

  • have you got a vacuum cleaner than can handle water?
    – Jasen
    Commented Aug 3, 2019 at 10:41
  • Hello, and welcome to Home Improvement. Good question; hope the answer helps. And, you should probably take our tour so you'll know how best to participate here. Commented Aug 3, 2019 at 13:33
  • @Jasen the part of the drain pain which goes under the coils and is accessible to me without taking out is small. Not sure a vacuum would fit
    – Peter
    Commented Aug 3, 2019 at 14:49
  • There are commercial products advertised for cleaning a/c drain lines, e.g. google.com/shopping/product/… Commented Aug 3, 2019 at 15:57
  • My 15 year old GE AC started doing that. irt and crud had blocked the water channel fro cold side to hot side of the unit. Took it out of its chasis, and scraped out as much crud as possible with a putty knife. Then hooked nalgene tubing to faucet, put the AC in the tub and sprayed it down. Avoided electronics as possible. Put soap on cooled intake fins and sprayed that hard. Shiny aluminum! Put the thing back together, and it works better than in the last decade. Moral: crud builds up over time, and you have to clean it out. Commented Aug 4, 2019 at 0:34

1 Answer 1


For servicing the workings of the whole unit can be taken indoors by undoing fastenings located indoors, leaving just the shell outside, you don't need the power of flight, but you do need to be strong, or gang up on it.

Some designs spray excess condensate water on the condenser coils to improve efficiency, the watery sound may be normal.

  • In some units the water level in the drain pan is set so that the condenser fan blades dip into the water and sling it over the coils. This does make noise but evidently improves efficiency. Commented Aug 3, 2019 at 12:16
  • I did notice that the water was being slung out of the fans and into the room occasionally.
    – Peter
    Commented Aug 3, 2019 at 14:23
  • The water being slung into the room would be water condensed on the evaporator coils. How long has this unit been in service? It may be necessary to remove the unit and clean it. Commented Aug 3, 2019 at 16:13
  • If you look at videos on cleaning window units, you will see how much is involved. Since these units are inexpensive (or were before the trade war) it might be that replacement is the only solution. youtube.com/watch?v=nmAkZlVErZQ Commented Aug 3, 2019 at 16:25
  • the water flinging should be in the outdoor part of the unit, if water is accumulating indoors check the rain that runs to the outdoor tray.
    – Jasen
    Commented Aug 3, 2019 at 20:55

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