Though this is always best to have a trusted, reputable professional to do any repairs, being familiar with the lingo is always a plus. There’s a simple way to break this down for those to better understand. All parts of the AC unit are important to allow it to fully function correctly. Here’s the breakdown of a few of those parts comparing them to the human body.
Compressor is the heart which is in charge of pumping refrigerant, which is the blood, through the entire system. It pumps the refrigerant through coils, which are the veins. It then gets returned to the condenser on your indoor unit which operates like sweat glands. The last big important piece is the thermostat, which is the brain of the system. It is what tells your AC what temperature cool down to and if it is automatic or on, etc.