Abstract: The fin and condenser coil cleaning device for air conditioner units is a cleaning device for cleaning the fins and condenser coils of window-mounted air conditioner units. A horizontal support is driven to selectively raise and lower with respect to the fins on the exterior portion of an air conditioner unit. The horizontal support carries nozzles for spraying water on the fins at sufficient pressure that the water passes through the fins and cleans the condenser coils contained within the housing of the air conditioner unit. A plurality of brushes are mounted on the horizontal support for brushing the fins as the horizontal support moves vertically with respect thereto. Sensors may be provided for controlling the direction of vertical movement of the horizontal support and for selectively actuating a motor and a pump for driving movement of the horizontal support and spraying the water through the nozzles.