The pan is not the problem, but it is not that great either. The open vent line before the drainline trap I would say is more of the issue. As air gets sucked through the drain and prevents condensate from properly draining.-GEO
Once in a while everything falls into place and I am able to move forward, most of the time it just falls all over the place and I can't go anywhere-GEO
It probably was a unit that had condensate drip off the coil and onto the blower and leak out the bottom of the unit. This is sort of common on those Carrier/Bryant/Payne units. It either has a dead circuit in the coil and when the water hits the dry section as it drips down there is no capillary action so it falls off the coil. Or, sometimes it just drips off possibly due to a coating of oil or other contaminant. Hitting the coil with some harsh condenser coil cleaner fixes it.
Those units can be mounted vertically or horizontally. There is a little plastic pan just under the coil.
Anyway. The picture if someones bright idea how to fix it.