This "energy saver" device installed by Dominion Power will turn off your A/C when you least expect it. Usually on the hottest day of the year.
You might consider that when calling them to have it installed.
This is what a Condenser Coil Cleaning looks like. The outside unit is disassembled and washed with a specific coil cleaner before being reassembled. It takes a couple of hours to complete. The unit will look clean when the job is complete and perform more like it did when it was a new air conditioner.
This is the condenser of a "mini-split" unit. These units are used to cool individual rooms or smaller spaces and are often referred to as "ductless" units.