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Do You Know the Essential Parts of Your AC System?

Understanding how your air conditioning system works is essential for keeping it running efficiently year-round. From filters to compressors, several common parts make up a residential or commercial AC system. Knowing what these parts are and what they do can help you take better care of your system. It also helps to identify any potential problems quickly. 

Taking a closer look at AC unit parts will enable to you identify if you need to contact a professional at Expert Air or if you can address the issue yourself. If you determine an experienced technician from Expert Air is needed, we are only a call away. We will determine where your A/C problem originates promptly and worry-freely. 

Key A/C Parts

  • Filters and Ducts
  • Compressor
  • Condenser Coil
  • Evaporator Coil
  • Thermostat

People need to understand that, as homeowners, the information provided when scheduling service appointments helps technicians get your unit in working order faster. You are helping yourself, your technician, and your wallet by listening to your unit and describing any new sounds.

So, what happens when your A/C unit decides shut down during the hottest week of the year? Most homeowners immediately check their filter because it is the easiest and cheapest item to correct. If that isn’t the issue, our service calls start with questions about specific sounds, bangs, or noises. Expert Air’s highly-trained staff can confidently get your A/C up and running possible quickly. Our technicians are experienced at locating any issues and resolving them effectively. Our goal is for you to be comfortable in your own space. If you have questions or problems, Expert Air is here to help. 

The A/C Parts to Know

Filters & Ducts

Dirty filters can reduce airflow through your HVAC system. This increases energy costs and reducing overall efficiency and cooling power in your home or business space. If you do not change your filter, the dust may bog down the moving parts of your A/C filter. Air filters should be checked monthly during peak season use and replaced whenever necessary to maintain optimal performance levels within your AC unit. We traditionally recommend replacing or washing reusable filters every 30 days. If you have a pleated filter over 1″, 45 days is an acceptable timeframe. This is taking into consideration that no one in your home suffers from allergies. Additionally, ducts should be inspected annually by a professional technician who can identify any blockages or leaks that may be hindering performance levels within your HVAC system. 

The Compressor

The compressor is one of the most important components in an air conditioner as it helps regulate the flow of refrigerant throughout the entire unit. It compresses the gas into liquid form, which then travels through two sets of coils to provide heating or cooling as requested by your thermostat. The compressor is also responsible for maintaining pressure within the system so that it operates correctly.

The compressor is a part that will make a lot of noise if it begins to fail. If your A/C is making growling, screeching, or clattering noises, it could be an electrical issue with your compressor. Another sign could be the vibrating of the unit. The sounds won’t go away on their own. Turn your unit off if you notice any sounds, and contact Expert Air. You may end up causing more damage to your unit if you keep it running.

The Condenser Coil

The condenser coil is located outside the house, and its job is to release heat from inside the home out into the atmosphere. This component works hand-in-hand with the compressor to regulate temperatures throughout your home. The condenser coil also pumps cold refrigerant back indoors, where it can be used to cool down air when needed.

When your condenser coil gets dirty from debris or weather-related problems, it can lead to a less effective cooling system. If you continue to use a unit with a dirty coil, you may find that your structure is not cooling efficiently. If you see debris around your outdoor unit, removing the trash as soon as possible is wise to see if that resolves your issue.

Evaporator Coils

As a component inside the house, the evaporator coils are responsible for absorbing heat from inside and transferring it outside using refrigerant gas as a medium. These coils work together with other parts, such as fans and blowers, to ensure that cool air is distributed evenly throughout your home or business. Proper maintenance of evaporator coils will help maximize their efficiency and prevent any problems from arising down the line.


The thermostat is one of the most important parts of any HVAC system. It is responsible for controlling temperatures within a space and works in tandem with your AC unit to maintain temperature levels that are comfortable and safe. If you notice that your thermostat isn’t properly regulating temperatures, it may be time to replace it.

Taking care of all these key components ensures maximum efficiency and life out of your AC unit while also enjoying clean, fresh air circulating throughout your living space all year round! Regularly replacing filters, inspecting ducts, and ensuring each part functions properly will help you get more value for money out of your AC system now—and for many years to come!

Take Action and Choose the Expert!

When you feel your HVAC unit may need repairing, understanding the essential parts that make the unit run is important. Knowing a little about the major components lets you identify if something isn’t operating at full capacity. If you have any questions about your HVAC repair, reach out to our team of trained professionals at Expert Air A/C and Heating. We’re always happy to talk with you and help you make the best decision for your home comfort needs. Let’s talk today!

Expert Air A/C and Heating is a trusted name in HVAC and generator installation services. We have provided heater repair, replacement, and maintenance to homeowners and businesses in Louisiana’s Northshore and Southshore areas for many years. Expert Air’s team of certified technicians is experienced in heater repair, replacement, and maintenance. No matter what make or model of the heater a homeowner has, Expert Air can help.

If you require AC repair, you can visit our website or email us at

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