Abstract: An air conditioner cleaning assembly cleans a housing of an air conditioning unit. The assembly includes a drain tray having a pair of side walls and a base wall coupled to and extending between the side walls. The base wall and the side walls defining a trough configured for receiving a fluid. An aperture extends through the base wall of the drain tray wherein the aperture drains the fluid from the trough. An attachment strap is coupled to and extends from the drain tray for securing the drain tray to an air conditioner such that the drain tray is positioned under the air conditioner. A sprayer assembly includes a sprayer for delivering fluid into a housing of the air conditioner.