Condensation on ac unit.?

Question

My inside ac unit has a bit of condensation on the top section. It works fine, just a little wet. Is this normal?

Answer 1

Jill O:

The air handler is insulated by the factory and under normal circumstances, in particular if the unit is located in conditioned space, sweating will not occur. It is possible that something is making the air temperature in the air handler lower than it should be. The main reason for this is an air obstruction.

Before assuming that this is "normal", take a close look at your filtration. Is the filter changed on a regular basis? Washable filters can look clean and still block air. Is there a way to look at the underside of the evaporator coil to see if it is becoming plugged with mold and/or debris? Is the air handler located in an area where hot, humid air could be leaking in from the attic and condensing on the unit? Is there any air circulation around the air handler, or is it in a closet with no ventilation or cooling?

There is a possibility of inadequately sized supply and return ducts leading to and from the air handler. The return air pathway should be as large and as unobstructed as possible.

You might think I am being unduly cautious, but in my trade I have seen big problems arise from seemingly small issues like yours. If, after due diligence, everything checks out o.k., at least you will have peace of mind regarding the case of the Sweating A/C Unit.

Answer 2

This can be normal if the area where you reside is high in humidity. However, if this is a new occurrance for you, then you might want to call an authorized HVAC location in your area, and follow-up to make sure that your particular unit has not been re-called by the manufacturer. Finally, the age of your unit may be to blame as well. At any rate, any maintence or mechinal change in your heating or cooling elements could be costly.

Answer 3

The condensation on the lines is very normal when in the cooling mode. You will even get condensation on the flue pipe that goes out to the roof. It all depends on the temp in the area and the temp of the lines.

Answer 4

Yep, normal as can be. Same as when you have a glass of ice water, and the outside of the glass gets wet. Not a problem.

Answer 5

It is completely normal. the warm moist air inside your house basically drops off the moisture on the colder coils as it passes through them.. ditto the cold lines.

Answer 6

all AC give off condensation

Answer 7

yep don't worry about it but if you want to help make sure the air flow goes out not up.

Answer 8

yes, on real humid days.