Indoor unit is about 11 years old. Have been having a major condensate
dripping problem from the A-coil fins for about 2 years now. This is
NOT A DRAIN problem. I have seen that a number of posts from other
homeowners over past years have had this same problem but most replies
are from folks who think the drain is clogged. THE DRAIN IS FUNCTIONING
PROPERLY. The dripping is coming from the surface of the angled fins,
when the condensate should be running down the fins to the drain pan.
I have used 3 cans of the coil cleaner from Lowes, and still have the
problem. The condensate drips from the angled fins onto the concrete
floor below and has created a mold problem. I have also tried cleaning
the fins with a solution involving a tablespoon of JET DRY and a
tablespoon of liquid soap in a half gallon of water. When spraying this
solution on the fins, condensate drips onto the concrete instead of
running down the fins into the drain pan (some of the condensate runs
down the fins into the drain pan but not all).
Cleaning with coil cleaner as well as the JET DRY solution has not
There is more condensate dripping from one side of the A-coil, than the
other side of the coil (by side, I mean one side of the "V"). It appears
that the side with most of the dripping is the side where freon vapor
returns (not the side where freon liquid enters).
There is no ice or frost on the A-coil when in the cooling mode and
when dripping occurs.
Placing a light above the A-coil, I can clearly see that plenty of light
is coming through the coil and fins; there is no visible clogging.
The A-coil provided proper heating last winter and is providing proper
cooling this summer (this is a residential heat pump). The indoor unit
has a TXV valve.
Has anyone solved the evaporator dripping problem?