Perhaps the most important part of an air conditioner is the compressor, which compresses the refrigerant. Compression warms the refrigerant, which is allowed to cool off before it is expanded, creating cool air.
The piping used within the air conditioner is also important. Small refrigerant leaks can quickly disable an air conditioner, and this piping must be able to withstand regular warming and cooling. Air conditioning systems also rely on multiple motors, all of which need to operate for extended periods of time. Airflow is essential for efficient performance, and a system's airflow is typically generated through fans and other basic components of the intake and in-home air distribution systems. Blockages lead to inefficient operation and higher electricity bills.