There is excess moisture in my room when i turn of the air conditioner. what is causing this?

If your air conditioner cooled your room (and dehumidified the air in it as it cooled the room), as soon as you open the door or window you'll admit warm, humid air from outside. If your room isn't sealed against wind, infiltration will allow warm, humid air in even if you keep the door and windows closed. Once that air strikes the cool surfaces of the room, the humidity condenses - much like it does when you take a cold glass of lemonade outside on a warm day. The solution is to control the influx of warm, humid air (caulking, weatherstripping, or just keeping the door and windows shut), and not cooling your room so much. Hope this helps.

a million-hose transportable A/C's do rationale low air stress within the room, and can suck in unconditioned air from the external. This is the purpose for twin-hose procedures, where there is not any internet exhaust of gasoline from the room, making them extra effective. There is not any means that you're going to break down a constitution with the small air stress change we're speakme approximately, nor will you be equipped to hermetically seal the room such that a vacuum is created.

Check outdoor drain for blockage and make sure the unit is leaning a little back to front.