1. The problem is that it is a YORK. York is simply garbage, especially the cheap contractor grade units, they last long enough to get out of the warranty period.
I am betting that there is a leak in the area of where the valve is on the outside unit, those things are known for leaking. If it was somewhere else, like there being a hole in the line or coil, I would expevt the leak to be much worse.
If you look on the outside unint neat where it connects, there is a funny looking vlave in line with the larger tube, there should be a cap on it, remove the cap, put some thread tape on it and tighten it back down. If the valve is leaking, that won't fix it, but it will prevent it from leaking out and causing the problem.
To replace the valve means you have to fully evacuate the system and charge it.
Try that at least.