Living in Las Vegas, you know how vital a functioning air conditioning system is. This is especially true when the summer hot air kicks in.

But have you wondered how air conditioning works? Companies like Bob’s Repair not only know the answer, but ensure your system performs at its best year-round.

This is a common question, and this post will provide you with insights so you can better understand the basic principles of air conditioning systems. In that way, you can easily troubleshoot minor issues to bring back comfortable indoor air into your home. 

A Bob’s Repair technician using refrigerant gauges on an outdoor air conditioning unit

It’s a Heat Mover, Not a Cold Creator: How Does an Air Conditioning System Work? 

Your air conditioner doesn’t create cold air. Instead, it transfers heat or unwanted heat from inside your home to the outside. 

🧽

Simple Analogy

Your air conditioner is like a tireless “heat sponge.”
Absorbs unwanted heat from inside your Las Vegas home
→
Releases that heat outside
→
❄️
Result: Cool, comfortable air for you!

The overall process is powered by a refrigerant. This special liquid acts like a sponge. Refrigerant absorbs heat, and the outdoor unit squeezes out that heat into the outdoor air. 

The Key Components: Your AC System’s Team 

Indoor Unit

  • Evaporator Cooling Coil: It’s the heat sponge inside. As warm indoor air is drawn into your AC system, it flows over this cold coil. The refrigerant in the coil absorbs the heat. The liquid turns into a gas. 
  • Air Handler (or Furnace): It’s the part of the unit that houses a powerful blower fan. It pulls the warm air inside over the evaporator coil and circulates the cooler air through your Las Vegas home through a network of air ducts. 

Outdoor Unit 

  • Compressor: It’s often referred to as the heart of the air conditioner, according to the Department of Energy. The compressor is a pump located in the outdoor unit of your air conditioning system. Its main job is to pressurize the refrigerant gas, which increases its pressure and temperature, resulting in it becoming very hot. 
  • Condenser Coils and Fan: Also known as the heat radiator for an air conditioner, the low-pressure refrigerant gas flows through the condenser coil or outdoor coil. The outdoor fan blows more outside air across these coils, which removes the heat from the refrigerant and releases it into the atmosphere. It causes the liquid to condense back into a high-pressure liquid. 
  • The Refrigerant: It’s the magic liquid or heat taxi of your air conditioning system. It circulates between the indoor and outdoor units. 

The Refrigeration Cycle Explained Step-by-Step 

How does the typical air conditioning system work step by step? Let’s walk through one loop of the refrigeration closed system. 

The Refrigeration Cycle: How Your AC Works

Click on each step to see how refrigerant flows through your air conditioning system

Indoor Unit
Outdoor Unit
Expansion Valve

Step 1: Heat Absorption (Inside)

The blower fan draws warm indoor air across the cold evaporator coil. The refrigerant absorbs heat from the warm air, causing it to transform from a low-pressure liquid into a low-pressure gas. Cool air is then blown back into your room.

Step 2: Heat Compression (Outside)

The now-gaseous refrigerant, laden with heat, travels to the compressor in the outdoor unit. The compressor puts this gas under very high pressure, which drastically increases the temperature, making it very hot.

Step 3: Heat Release & Expansion (Return)

The hot refrigerant releases heat through the condenser, then passes through an expansion valve. This reduces pressure and temperature significantly, making it extremely cold before returning to the evaporator coil to start the cycle again.

Why Understanding This Matters to You as a Las Vegas Homeowner

Understanding how your air conditioner works is vital for you as a homeowner. Here are the benefits of having such knowledge. 

  • Troubleshooting: If your indoor fan is blowing but the air isn’t cold, it could mean the heat exchange process isn’t working correctly in your outdoor condenser unit. This could be the result of dirty condenser oil or an issue with the compressor. 
  • Maintenance: The DOE states that a dirty evaporator coil in your home can’t absorb heat efficiently. A clogged condenser coil outside can’t release it effectively. It makes the system work harder. It reduces energy efficiency and increases your cooling bills. For that reason, professional cleaning and regular filter changes are vital for the optimal performance of your air conditioning systems. Your system has to work harder as filters become loaded with particulates. 
  • Indoor Air Quality and Comfort: Air conditioning systems improve indoor air quality by reducing airborne particulates and pollutants. They also provide a comfortable temperature, thereby enhancing your living conditions while preventing common health problems. 

Do You Turn the AC Up or Down to Make It Cold? 

To make your home colder, you need to turn the AC down to a lower temperature setting on your thermostat. It tells your AC system to continue cooling until it reaches that desired lower, comfortable temperature. 

How Does a Car AC Work? 

The principles of car AC work are similar to your home’s air conditioning system. A car AC system also uses a compressor, condenser, expansion valve, and evaporator coil to move heat out of the car’s cabin.

Furthermore, the refrigerant flows through these vital components to absorb heat from the indoor air of the car and release it outside during a system operation. The scale and power source differ, as well as its absolute temperature. However, the fundamental air conditioning process remains the same. 

Keep Them Clean and Well-Maintained 

Now that you see how these parts of your AC work, you understand why you need to keep them clean and maintained. Contact us to schedule a professional tune-up and keep your AC running at peak performance all the time.