Not puuling humidity out

To answer with any clarity I need to know is this a window type unit or central and what kind of thermostat do you have electronic display or no display just t knob pointer? Also I need to know what is running and what is not running when your trying to get it to dehum. I.E. Fan only Fan and compressor only Fan out side and compressor unknown if it is running...

And here is a real stickler, you said it has a leak and had to have a charge of refrigerant. What kind of refrigerant is it R22, R134A, R410A... And for sure was the evaporator coil still iced up when you decided it was low on charge or was it defrosted and room temperature?

All these questions have to be answered to get you steered into the correct area.

A low charge diagnosis for instance can be miss read if the evaporator is iced up or has any ice in or on it. A sticking thermostat, relay, causing the compressor to run on when it should be off, or air flow blocked or the fan motor on the evaporator cutting off when it should be on or a dirty filter or closed vent, or misplaced thermostat sensor could all lead to a freeze up of the inside coil as well as a few dozen other things other than low charge.

If these ideas give you an indication as to where to look or what to check futher please rate me as high as you can. If you need more information I need you to answer soem of the above questions with as much clarity as you can. And thanks for using fixya.