Air Conditioning 101: How Does the Compressor Work?

Have you ever thought about how your air conditioner keeps your Whitesburg, Kentucky, home cool? An air conditioner effectively removes heat from the air inside your home, sends that heat outdoors, and then recirculates newly cooled air throughout your house. To appreciate this process, it’s helpful to understand the compressor, an essential component inside your air conditioner, how it functions, and the maintenance required to keep it working efficiently.


 

Air Conditioning System Parts

 

Central air conditioning systems are primarily made up of three key components: an evaporator, a condenser, and a compressor. The compressor essentially acts as a vital link, serving as a go-between connecting the evaporator (located inside your air handler unit) and the condenser (the larger unit situated outside your home).


 

The Air Conditioning Process

 

Your air conditioner initiates the cooling process by pulling warm air from various rooms throughout your house through return air vents. This warm air then passes over the coils in the evaporator unit. These coils are filled with a gaseous refrigerant, which readily absorbs the heat from the indoor air. The now heat-filled refrigerant is then pumped outdoors to the condenser unit. Here, the absorbed heat can be effectively released into the outside air. Once the heat has been dissipated, the refrigerant travels back to the evaporator, where the process begins again, creating a continuous cooling cycle.


 

The Role of the Compressor

 

When refrigerant leaves an air conditioner’s evaporator, it is in the form of a low-pressure gas, having absorbed heat from your home. To efficiently release this absorbed heat outdoors, the refrigerant needs to be transformed into a higher-temperature, higher-pressure state. This is precisely where the compressor’s crucial role comes into play.

The compressor actively packs the molecules in the gas-based refrigerant tightly together. This process, known as compression, significantly raises both the temperature and pressure of the refrigerant. With the refrigerant now at a much higher temperature than the cooler outdoor air, heat naturally moves from the warmer refrigerant to the cooler surroundings. This allows the heat to be efficiently released to the outdoors through the condenser, effectively expelling unwanted warmth from your home.


 

Air Conditioner Compressor Maintenance

 

Due to its complex nature and involvement with high-pressure refrigerants, only a licensed HVAC service technician should perform any tune-ups or repairs on your air conditioner’s compressor.

During a routine air conditioning maintenance visit, our service technicians will carry out vital checks, including verifying the refrigerant levels to ensure the correct amount is present. Running your air conditioner with too little refrigerant (often indicative of a leak) can put immense stress on the compressor. This is because the compressor has to work harder to achieve the desired cooling effect with an insufficient amount of refrigerant. Over time, this sustained stress could lead to the premature failure of the compressor, necessitating a costly repair or replacement. Regular professional maintenance helps prevent such issues, ensuring your compressor and entire AC system operate reliably and efficiently.