Air Conditioning - A/C Split unit Leaking/sucking water from A-Coil

Hello,
I need some help figuring this one out. A/C Works fine, The system is a Nordyne Split unit. Inside is the A-Coil over the blower over the Heater coils and it blows out the bottom (mobile home). A/C works fine, but the blower was pulling in Air through the ACoil or pan and causeing large puddles on the floor. This system came with THIN Metal mesh type filters which seem to work POORLY. Removed them for cleaning and saw dirt/dust all over the coils. Cleaned the coils with some 409 spray and garden hose as best I could, and rinsed the metal filters, it Seems to work fine again. HOW can I prevent this from hapening again ? :confused:

PROBLEM : I tried using regular 1 inch filters on the coils to prevent this from hapening again and I can get rid of the aluminum mesh filters, BUT this causes water to be sucked out of the pan , and going underneath the coils. Pan isnt full or anything but what little water is there is being sucked under the coil. When I removed the filters it stopped and went through drain pipe as it should. The metal filters allow so much air flow (and dust) that it drains fine, but when I put regular pleated filters, it creates resistance so the water and air gets sucked under the a-coil and onto the fan and down into the vents. :wall:

Could there still be junk in the coils way at the bottom ? looks pretty clean from top and seems to work fine with old aluminum mesh.

Is there a solution or do I just get used to breaking out the hose and cleaners ? I thought about putting a large filter on the panel door but its not made for that, maybe I could just rigg up a way to do this or would this still cause water to be sucked under the coils ? Thanks for any info. Its HOT out here in TEXAS.. :madhell:

I thought about putting a large filter on the panel door but its not made for that, maybe I could just rigg up a way to do this or would this still cause water to be sucked under the coils ? Thanks for any info. Its HOT out here in TEXAS.. :madhell:
I've done this on many mobile home units using what I call "horsehair" filters. They are washable, usually blue or green, and you cut them to size.

Cut them the size of the outside of the door then wedge them into the bent groove inside the door and slide door back in place. They aren't the best but are far superior to the aluminum stuff you have. Just remember that if you have a fresh air return, that air won't be filtered when the filter is moved to the door.

Not sure why you have a water leak. Doesn't seem to make sense the way you describe it.
HTH

It sounds like there is no trap in the drain pipe. Anytime a fan draws air thru the evaporator coil there must be a trap in the drain line. In most mobile homes the fan blows thru the coil so a trap is not needed but since yours draws thru, a trap is a must.
CovTiger's suggestion of a horsehair (also called hog hair) filter is a good one. For better cleaning of the coil, I suggest you go to a plumbing or HVAC supply house & get some actual coil cleaner. It now is available in an aerosol can. Just follow the directions on the can.

One note on cleaning. Make sure it is not a "foaming" cleaner, or make sure you rinse it completely off.

If your fan draws air across the coil with the foaming of the cleaner there is a very good chance you will burn up your motor.