What makes a refridge or air conditioner put out excessive water? Two instances at the large store where I work. One of those soft drink coolers by the cash register was dumping water on the floor right next to another just like it that wasn't. I checked the pan under it and it was overflowing. We called the HVAC but I didn't hear what the problem was. In the other case water was dripping from the ceiling quite nicely. I put buckets everywhere and still a puddle was forming on the floor. One of the managers went on the roof and said all the air units were dripping the same-nothing unusual. The humidity was quite high that day. There's no other source of water that it could be other than a roof air unit to my knowledge. After calling the field maintenance group we disconected that unit and the water slowed considerably and eventually stopped.