Hello, from my understanding you have some issues in regards to water buildup or leakage coming from the unit.
There might be a possibility that either the external drain pan is cracked/broken or the internal drain pan is clogged with debris.
For the internal drain pan, there is a drainage hole for the condensation to run down into the external drain pan.
Please see attached photos for a better idea of what to look for.
The drainage hole within that internal drain pan would be on the right hand side and
the condensation would drain down through internal tubing (that we can’t see) to the external drain pan.
The external drain pan sits above the compressor as the compressor would get warm enough to evaporate the water caught in it.
If the internal drain pan is filled to the brim due to blockage of the internal tubing, you might need to use a mesh wire brush to “snake out” the debris.
Please be aware that upon doing so, the excess condensation might overflow the external drain pan on the back and wet the compressor’s electrical components.
You may place a few towels in between the top of the compressor and underneath the external pan to reduce spillage.
TEMPLATE RESPONSE:
The presence and occurrence of light frosting on unit's interior back wall is to be expected.
Any AC/Refrigeration system, residential or commercial, will have condensation produced during operation.
During the warmer summer months, even more prevalent in humid environments, the amount of condensation and frosting will increase. What I am seeing in your photo is normal and not detrimental to the unit's functionality or longevity.
There is a drainage hole for the condensation to run down into the external drain pan.
Please see attached photos for a better idea of what to look for.
The drainage hole within will drain down through internal tubing (that we can’t see) to the external drain pan on top of compressor.
The external drain pan sits above the compressor as the compressor would get warm enough to evaporate the water caught in it.
Please see attached pdf and pictures as well.
EXTERNAL DRAIN PAN ON THE BACK BOTTOM OF UNIT:
INTERNAL DRAIN PAN ON THE LOWER INSIDE, JUST UNDERNEATH THE EVAP PLATE:
INTERNAL DRAINAGE HOLE: (FOUND TOWARDS ALONG THE BOTTOM OF BACKWALL).
LIGHT COATING OF FROST AS SHOWN BELOWE IS NORMAL
Depending on a unit’s design whether it’s a natural draft (exposed evaporator w/o fans) or forced draft (concealed evap with fans), a minor amount of ice or light frosting on the back wall is to be expected
