How an Air Conditioning System Works: Simple Explanation for St. Louis Homeowners
How Your AC System Works A lot has changed in the 100 plus years since the invention of the first modern air conditioning system. However, today’s central air conditioners still work using many of the same basic principles. So how does a central air conditioner work? How an Air Conditioner Actually Cools Your Home An air conditioning system doesn’t create cold—it moves heat from inside your home to the outside. That cooling happens through a closed loop called the refrigeration cycle, which uses a refrigerant and four main components to absorb indoor heat and reject it outdoors. Understanding the basics helps you recognize issues early and get the most efficient performance from your system. Compressor: Often called the heart of the system, the compressor squeezes the low-pressure refrigerant gas, raising its pressure and temperature so it can release heat when it moves to the condenser. Condenser: Located outside, the condenser coil releases the heat the refrigerant picked up inside. As the hot, high-pressure gas passes through, it cools and condenses into a liquid. Expansion device (or metering device): This component (like a thermal expansion valve or capillary tube) reduces the pressure of the liquid refrigerant, causing it to cool rapidly...
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