The Parts and Functionalities of an Air Conditioner

The Parts and Functionalities of an Air Conditioner
  • Author: Mohsin Khan
  • Posted On: August 19, 2022
  • Updated On: July 10, 2023

An air conditioner unit is one of the most used appliances in almost every home. It is most commonly used in the summer to cool the air inside your home, but some people also use it to heat their homes during the winter period.

It’s really hard to get by without an AC, especially in the harsh summer months. As a result, more and more people are installing AC units in their homes, but don’t always know how it really works

When you usually purchase something, you want to know how it works and how to maintain it, so you can use it for a long time. So, if you want your AC system to work properly and serve you for a long period, it’s best to get to know its parts and how it works.

Functionalities of an AC unit

An AC system is an electrical device that’s used to remove heat and moisture from the interior of an occupied space. This means that it is used to achieve a more comfortable environment for humans and animals.

It is also used to cool and dehumidify rooms containing heat-producing electronic devices like power amplifiers and computer servers, as well as spaces that contain delicate products such as artwork.

The primary purpose of an AC unit is to create a room climate comfortable for humans to do their daily tasks. Knowing the functions of an AC unit is very important when purchasing one. However, it’s also very important to hire local professionals to install and maintain your unit, so you can be sure that it works properly.

For instance, if you live in St Catharines, one of the largest urban areas in Ontario, you should look for the best air conditioner installation St Catharines has to offer, so you can be sure that your home and family are comfortable throughout the year.

Remember, regular maintenance and proper installation are essential for keeping your AC unit in top condition at all times.

Components of an AC unit


The refrigerant is a special fluid that is vital to the AC unit. It carries heat from the inside of your house to the outside. The refrigerant absorbs heat from your indoor air and changes the state from gas to liquid. Once it has dispersed the heat outdoors, it changes back to its gaseous state and travels back indoors.


The compressor is another important part of an AC unit. It turns gas into a liquid, and its function is to convert a gaseous low-pressure refrigerant from the evaporator into a high-pressure gas before entering the condenser. This process enables the AC to cool down the warm air.

Condenser coil

This part is attached to a fan, which cools down the gas that comes in at high pressure. The refrigerant travels from the compressor to the condenser coil, and it expels the heat collected from indoors to the outdoors. Once it is cooled to a liquid, it circulated back inside to collect more warm air in the evaporator coil.

Evaporator coil

Once the liquid leaves the condenser coil it travels to the evaporator through very small pipes. Inside the evaporator, the pressure is very low and converts the liquid to a gaseous state. It is located near the blower and is responsible for extracting heat and humidity from the air.


This part circulates cooled air into your home and pulls warm air back for re-cooling. It also works with your furnace. A blowing unit and air handler are responsible for the equal distribution of cold air throughout the house.

Air filter

Every AC unit comes with a filter. It keeps the dust and dirt of the air from getting into the main unit of your air conditioner. Without a filter, dust and dirt would collect on the AC components, and possibly damage them. So, make sure you install an efficient filter that can even improve indoor air quality while the AC operates.


This part helps the AC system to maintain the correct temperature. If the AC is not at the right temperature inside, the various AC parts won’t function properly. If it’s not cooling the air in your house, it might be due to a damaged thermostat. The thermostat helps you change temperature settings based on your needs.

An Air Conditioner Maintains the perfect temperature

Final thoughts

Once you know your AC unit’s parts and functions, you need to take care of them as well. Get your AC system cleaned and serviced regularly to keep the various parts in proper working condition.

Keep in mind that an air conditioner is a type of machine that relies on all of its parts to work properly. This means that all parts should remain in good shape at all times.

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Author: Mohsin Khan

Mohsin has worked as one of the experienced editors with ConstructionHow since 2020 with a total span of 5 years of experience in business PR, boasting a remarkable professional trajectory, he has collaborated with entrepreneurs and startups, and certain publications over the last few years. His unwavering interest lies in the construction industry and related materials. He believes in creating functional and aesthetically pleasing buildings, and homes that fall under the right budget. With a wide range of experience in construction, he also tapped into DIY and home improvement projects based on his extensive set of knowledge in the industry.