If submitting a service request after hours or on the weekend, please note it is best to call.

Rated 4.9 out of 5.0 based on 729 reviews
(601) 255-7347 Emergency Service Available Request Service

The Science of Air Conditioning

June 28, 2023 | Blog

While air conditioners seem like super technical and complicated devices, you don’t need to be a licensed technician to understand how they work. In reality, most cooling systems only rely on four main components and refrigerant to get the job done.

If you’ve ever wanted to learn more about how your AC keeps your home cool, Channell Heating & Cooling is here to serve as your trusted source of air conditioner information!

Air Conditioner Components

It’s a lot easier to understand how a system works once you’re familiar with all of the parts. Here’s a list of key air conditioning parts and a brief explanation of what they all do:

  • Evaporator coil — transfers heat from the indoor air to the cool refrigerant
  • Compressor — compresses warmed refrigerant vapor to raise the temperature
  • Condenser coil — releases heat to change refrigerant gas back into a liquid
  • Expansion valve — reduces pressure to rapidly cool liquid refrigerant

Now that you have a better understanding of your AC’s main components, the next step is learning how all of these pieces work together to keep your home cool!

How Your AC Cools Your Home


Refrigerant is the substance that connects all of the components in your cooling system. As it cycles through your air conditioner, the refrigerant constantly changes from a liquid to a gas and back again as it’s heated and cooled during different stages.

Cold Side

The cold side of your air conditioning system contains the evaporator coil and a fan that pushes air over the cold coils before the cooled air moves through your ductwork and into your entire home. Cold side components are housed inside your home, near the area where you typically replace your air filter.

As warm air comes into contact with the cold coils, energy is transferred from the air to the coils causing the air to cool down.

Hot Side

The compressor and condenser are the hot side components found in the outdoor unit. The hot side is where the refrigerant is able to transport the heat energy it collected from the air indoors and release it outdoors.

Once the heat is released, the refrigerant is cooled back down and pumped back into the cold coils.

Expansion Valve

The expansion valve isn’t part of the cold or hot side, but is still an important part in the system. The expansion valve serves as the refrigerant regulator to ensure that the right amount of refrigerant is delivered to the evaporator coils to promote proper cooling.

A malfunctioning expansion valve can be a big problem for your AC if it sends the wrong amount of refrigerant down the line. If your expansion valve becomes stuck or clogged, it can cause your air conditioner to overheat and break down.

Your Trusted Hazlehurst AC Team!

No matter how familiar you may be with air conditioning systems, it’s always best to contact a licensed AC technician to assist you with any necessary repairs and maintenance. For all of your AC repair and installation needs in the Hazlehurst area, Channell Heating & Cooling has got you covered! Contact us today to schedule a consultation!

Why Choose Us?

We stand by our 100% customer satisfaction guarantee

Learn More
shaking hands icon
BBB Accredited Business
We are fully Accredited by the BBB.
people icon
Professional Staff
Our highly trained and certified AC technicians are dedicated to offering 5-star AC service every time.
ribbon icon
Award Winning Service
We're humbled to be considered one of the top air conditioning companies in the Hazlehurst area.
thumbs up icon
We worry so that you don't have to. We offer stress-free service calls and AC installations.

What Our Customers Are Saying

Professional and Respectful

Brad and Levi installed my new unit. They were both professional and respectful. Brad is a very good person. He has an amazing testimony. I enjoyed talking to him and his work ethics. Brad and Levi did a great job. It feels good to have air again. Thank you for your service.

Steph M.

Very Thankful for Their Service

They installed our old system and took care if all maintenance since 1995. This year it finally needed replacing. They installed a quality Trane system and it’s been running efficiently ever since. Very thankful for their service.

Charita M.

Definitely Recommend Channell Heating and Cooling

Definitely recommend Channell Heating and Cooling. Their staff is honest and friendly (even when my dog nips their ankles). Always available when I call, even on weekends and holidays. Been using them for home and work for many years. Great company.

Rebecca T.