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What Are Some Of The Most Important Parts Of An Air Conditioner?

 August 31, 2020

By  Cool Man

An air conditioner is a complex system that consists of many different parts. A unit is able to keep a property cool when these parts work together. If even one of these parts fails, it will have an impact on the performance of the system. In some cases, it may keep an aircon from running at all.

It can be beneficial to learn more about the most important parts of an air conditioner, as well as aircon maintenance. If you take steps to keep all of these parts in good condition, it’s far less likely that you’ll have issues with your unit in the future.


While fans are often used to circulate air, the fan on an aircon generally serves another purpose. When the unit is operating, it can become hot. A fan is designed to cool down the unit so that it can continue to operate efficiently and so that it does not give off heat.

If a fan is malfunctioning, it’s likely that you’ll start to hear odd noises from your unit, such a rattling sound. On top of that, a faulty fan is likely to cause your unit to run hot, which means your home won’t be as cool as it should be. Thankfully, if a fan is worn down or damaged, it can be replaced.


While a blower may seem like it’s similar to a fan, it actually serves a different purpose. In an aircon, a blower is designed to circulate cooled air throughout a home. Your unit’s blower is the reason that cold air flows out of the unit’s supply register.

Of course, a blower doesn’t just distribute cool air. It can also pull in hot or room temperature air in a space so that it can be cooled. If an air conditioner is part of a heating and cooling system, the blower will also be able to spread hot air throughout a space.


Air conditioners use refrigerant to produce cool air. That refrigerant is in a gaseous state after an aircon has absorbed heat. When that air moves through the compressor, it is pressurized, which actually causes it to heat up even more.

This may seem like a strange process. After all, an aircon is meant to spread cool air, not hot air. However, this step makes it possible for the refrigerant to give up the heat that has been produced.

Evaporator Coil

The component, which is located indoors, is next to the unit’s blower. It’s specifically designed to extract heat from the air, along with humidity. This is only possible because of the refrigerant in the air conditioner.

People can feel that air conditioners give off cool air, but many people don’t realise that these units also remove hot air from a space. This is one of the reasons that an aircon is able to cool down a space is such a short period of time. Thanks to the evaporator coil, it’s easier to keep a room at a comfortable temperature, even when the weather is quite hot.

Condenser Coil

This component functions in a similar way to the evaporator coil, but it’s located outdoors rather than indoors. When refrigerant travels to this part of the unit, hot air is able to be expelled outside. Because of this, the area around the outdoor unit can be fairly hot when an air conditioner is running.

Refrigerant continually circulates throughout an air conditioner. After it is cooled to a liquid, it is circulated back indoors so that more heat can be collected by the evaporator coil and then pushed outside. This process will continue as long as an air conditioner is running.


When operating an air conditioner, you can set it to your desired temperature using a thermostat. In many cases, people choose to keep their home at a slightly warmer temperature during the day, and then lower the thermostat to a lower temperature in the evening. This makes it possible to sleep comfortably.

Many units have a programmable thermostat, allowing air conditioner settings to be adjusted even when you aren’t in the home. It’s common for people to keep home temperatures higher during the day when they are at work, and then have the air conditioner provide more cool air when the end of the work day draws near.

Air Filter

When the blower draws in air, that air must pass through a filter. The filter will remove dust and other particles from the air so that they do not have an impact on the performance of the aircon. How the filter functions can vary based on the unit. In some cases, filters need to be cleaned periodically, but in other cases, filters will need to be swapped out and replaced.

If the filter is neglected, it will have an impact on the performance of the aircon. Without an efficient filter, it will take longer for the aircon to produce cool air, and in some cases, the air being produced by the unit may not be as cool as it should be. Anyone with an aircon in their home should make sure the filter is being changed or cleaned as needed.

How To Avoid Problems

One of the best ways to prevent issues with an aircon is to watch out for warning signs. Usually, if there is an issue with one or more of these parts, there will be some clear indicators.

A decrease in performance is one of the main signs of a problem. Noises can also indicate an issue. In addition to being aware of potential problems, it’s important to have your unit serviced on a regular basis. If any repairs are needed, professionals will be able to provide them.

The lifespan of an air conditioner decreases when the unit isn’t properly cared for. That’s why it can be useful to learn about the important parts of an air conditioner and how they function. You should work to ensure every part in your AC unit is working as intended.

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