BobVila.com

Air Handler in Garage

I guess the closet could be insulated. They have sealed the unit so much with a black tar-like gum that I doubt the drain or pan is leaking (I'll ask though). The condensation is all over the unit...even towards the top away from the drain. I'm pretty sure they have added refrigerant. When I talked to my local building inspectors, they had me ask if they overfilled the refrigerant. Four different A/C guys with 3 different companies have checked the levels and said that they are correct. They also increased the blower speed and the intake air filter is clean.

Here's my non-HVAC certified theory: the air passing through the handler is cold...the air around the unit is hot and humid. Kind of like a cup of ice-water on a hot day...it condensates on the outside. But why is my air handler the only one that is doing this?