Question about Sharp AF-S120FX Air Conditioner

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Air conditioner leaking

I have a Sharp AF-S120FX air conditioner. I've had it about a year. Just recently, it started leaking water on the inside of the house. It is tilted the right way, so water should drain to the outside, but still, it drips on the inside. I've read solutions where it says the drains are clogged and to clear them--but where are they? How do I find the drain pipe? I have removed the front grill and taken off the filter and just see a silver grill. Where do I go to find the drain pipes so that I may unclog them? Thank you.

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Hi, There are no pipes, just passage ways on a window unit. It probably needs cleaned. Window units naturally create water in the evaporator area. The water is suppose to drain to the back of the unit through passage ways to the condensing area where the slinger ring on the condenser fan blade slings it into the condenser coil making it more efficient. There is usually a drain hole to drain excess water from the back of the unit. Any dirt or algae in the pathway of this water or the wrong tilt will cause water to build up and drip or blow out the front. Anything touching the evaporator coil allowing water to run down the obstacle into the wrong area will cause the same thing. reduced air flow will cause the evap to freeze which could also cause a water problem. Since the tilt is right and it doesn't seem to be freezing, Maybe a temporary increase in tilt and a dropper of bleach at the base of the evaporator would do it. This will kill the algae and may unblock the water flow. NOTE: It may also cause stains on a carpet or floor if the bleach water drips onto it. If you want to pull it out and clean it, most units can be pulled out of the housing and sprayed with a water hose but you need to be careful not to get water in the electrical parts of the unit. They can be covered with plastic or foil. Make sure you unplug the unit before trying to remove it. You may have to remove some screws to remove it from the housing. Hope this has helped. kstfas

Posted on Sep 19, 2007

  • johnlazcano Jul 11, 2011

    I just fixed this on my Sharp AF-S125RX, but I can not find my instructions on Fixya for some reason. UNPLUG THE POWER CORD and pull the unit from the window. Try not do damage the front or rear radiator coils. You basically have to remove the entire front plastic cover (both the filter cover, filter and the rest of the plastic cover too, 7-9 screws/two plastic clip-ins at the top, jiggle and it should pop out, try not to break the plastic, patience) as well as the metal casing that covers the side and top of the unit. You may also have to remove the sliding accordion flaps. All in all it is like 10- 15 screws (put them in a cup or jar don’t lose them) including the ones for the digital control (when you pop the front plastic cover off feed the control through the hole it sits on so you can fully remove the plastic cover). Don't force the plastic and be careful not to damage or soak the digital control or wiring anywhere on the AC unit. Once you get both the front, top/back covers off flush the front coil (aluminum radiator in the front) and the entire rear area of the unit too with hot tap water not too much pressure, but enough to do the job. Watch all the dirt and scum flush away. With a flashlight, peer into the guts of the unit. You should see a V shaped groove that appears from under the front coil case (my case was made of Styrofoam). Use your logic and ask: where is the water supposed to go after accumulating under the front coil’s pan (my pan was made of Styrofoam)? And clean out the obvious path. Make sure that the unit is really, really clean. Algae, leaves and dirt have to go. After cleaning have the unit flat and at a slight tilt back (same as when it is installed) and flush water into the front coils and try to watch the water come out the drain hole. The hole should drip water if the system is clean. Make sure the V groove and the entire path the water takes is well flushed out because you do not want to do this again. Nice hot, hot tap water should do the trick. Use a hose or a pot from your kitchen and pour the water, carefully near electronics (if you get wires and electronics wet give them time to dry before plugging the unit back in). Put everything back together and good luck. If you flush it right the AC unit should drain like the day you bought it. By the way many people are talking about using bleach, but I found that this can cause corrosion and it is a bit toxic especially if your system is backed up and you pour it into the water that will not drain. It may work, but I would not do it.



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