most window units use the water in pan and throw it upon condenser which evaporates it. need to check if its level side to side with a slight tilt to the back in window.
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Question moved from Cars and Trucks category.
It is the opposite of replacing the cover. Undo the screws and remove the case with the top vents. It _should_ leave the control panel in place but it is does move, be sure to disconnect it. Clean with Tilex Spray to kill the mold and then rinse well and use a strong detergent to remove grime and dust.
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Try to Google the manual. I would think cycling the power would reset the machine. Turn breaker off and back on. If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79
Assuming you have a hose connected to the bucket for drainage, it is necessary that the end of the hose be lower than the top level of the bucket or the bucket will fill before the hose drains. I see many people who have their units on the floor and run a hose up into a sink and wonder why the bucket fills. Gravity works.....if you cannot find a lower place to drain the water then you must raise the unit up on a table or stand of some sort to get the bucket higher than the drain.
That's what happens with loose electric connections. Need to go from the breaker to the AC unit power run inspecting each wire splice, all electric connections need to be clean and tight. A loose connection becomes electrical resistance and electrical resistance consumes power, power consumed is dissipated as heat. Overheated, charred, discolored connections can be cut off and reconnected when found. Start by tightening the circuit breaker wires, and neutral if any.