Best AC repairing service in mumbai The air conditioning technicians install, inspect, maintain, and repair air conditioner. They ventilate equipment and controls making sure they operate efficiently and continuously. They perform regular maintenance work on cooling units. They diagnose electrical and mechanical defects and malfunctions. Air conditioning (often referred to as AC, A/C or air con) is a system used to cool down the temperature in an inside space by removing the existing heat and moisture from the room. Essentially, they work by taking warm air into a system and dispersing cold air, but there is much more to this process.