{"id":35840,"date":"2026-10-24T10:01:00","date_gmt":"2026-10-24T14:01:00","guid":{"rendered":"https:\/\/learningtcf.com\/how-air-conditioning-works\/"},"modified":"2026-10-24T18:30:27","modified_gmt":"2026-10-24T22:30:27","slug":"how-air-conditioning-works","status":"publish","type":"post","link":"https:\/\/learningtcf.com\/en\/how-air-conditioning-works\/","title":{"rendered":"How an air conditioner works: the refrigeration cycle made simple"},"content":{"rendered":"\n

An air conditioner does not \u201cmake\u201d cold: it takes the heat out of your home and carries it outside. It does this with a refrigerant that circulates nonstop through four components.<\/p>\n\n\n\n

1. The compressor<\/h2>\n\n\n\n

It is in the outdoor unit. It compresses the refrigerant while it is a gas, which raises its pressure and temperature.<\/p>\n\n\n\n

2. The condenser<\/h2>\n\n\n\n

Also outside. The hot gas flows through its tubes and the fan removes the heat. As it cools, the refrigerant turns into a liquid.<\/p>\n\n\n\n

3. The expansion device<\/h2>\n\n\n\n

It can be a valve or a small tube. It makes the liquid refrigerant drop sharply in pressure, which makes its temperature drop a lot.<\/p>\n\n\n\n

4. The evaporator<\/h2>\n\n\n\n

It is inside, in the ceiling, wall or closet unit. The cold refrigerant flows through its tubes and the fan blows the home\u2019s air across them: the air cools down, and the refrigerant absorbs that heat and turns back into a gas. From there it returns to the compressor and the cycle starts again.<\/p>\n\n\n\n

What about humidity?<\/h2>\n\n\n\n

As air passes over the cold evaporator, its moisture condenses into water droplets. That is why air conditioners have a drain: besides cooling, they dry the air.<\/p>\n\n\n\n

What about heating?<\/h2>\n\n\n\n

A heat pump uses the same cycle in reverse: with a reversing valve it takes heat from the outdoor air and brings it inside.<\/p>\n\n\n\n

In the HVAC Technician Combo you follow this cycle in animations and interactive practices, and learn each component step by step.<\/p>

See the HVAC Technician Combo<\/a>Try a free practice<\/a><\/div><\/div>\n\n\n\n

Educational content from Learning Trade Center of Florida.<\/p>\n","protected":false},"excerpt":{"rendered":"

The refrigeration cycle in four steps: compressor, condenser, expansion and evaporator, explained 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