The method of removing the housing of the air conditioner: the front panel of the window machine is removable. It has one or two screws (at the switch), and the screw is dropped to remove the adhesive tape of the front panel and the rear cover, and the front panel is down.
Then remove the screws on both sides of the box and the top, and the lid can be removed. Flush the rear heat sink with tap water. Be careful not to pour water on the circuit board and motor.