Arrived on site for no Cooling. Customers AC was running fully functional when I arrived. Customer wanted to know why the unit shut off. Customer said that they shut off the unit from both thermostats and I started it back up in the unit started normally. Went up to the attic to the air handler to inspect the reason of the shutoff. Noticed a small amount of water on the emergency drain pan that look like it came from a little gap opening of the evaporator coil panel. Dried up the wet spot and opened up the panel to check out the coils.