[header] How to understand the basic operation of the home air conditioning system [title] Understand what the compressor does. [step] The compressor is the heart of a basic home air and heat unit. It pumps vapor refrigerant through the system and maintains the internal pressure of your home unit based on the temperature of it surroundings. 
[title] Understand the role of the condenser. [step] This is where the refrigerant goes once it leaves the compressor.