I live in Fl and my heat pump is outside and the air handler is in the attic. I discovered the tray under the air handler was overflowing and used a wet vac to remove it. My ceiling is getting wetter and wetter in an area about 1x2 feet. I've removed the insulation where the water is and can't figure out what's leaking. Any suggestions?

This "tray" is probably a secondary drain pan, the main drain is probably plugged up and you need to clear this drain, it will be a 3/4" line connected to the air handler and going outside or to the tail piece on a sink in the bathroom. Turn off the a/c and remove the panel on the air handler and you will see the drain pan inside the unit, make sure nothing is blocking it.