The AC Outdoor Unit Parts of your air conditioner acts like a heat pump for your home. The compressor, the heart of the system, pressurizes a refrigerant that absorbs heat from inside. This hot refrigerant travels through the condenser coil, where a fan blows outside air over it, releasing the heat. An expansion valve then regulates the refrigerant, allowing it to absorb even more heat when it reaches the indoor unit.
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