Where Is the Evaporator Coil Located in an Air Conditioner?

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In the oppressive heat of summer, an air conditioner becomes our saving grace, providing respite from the sweltering temperatures. But have you ever wondered how your air conditioner works its magic? One of its essential components is the evaporator coil, which plays a crucial role in cooling the air in your home.

How To Clean Evaporator Coil In Attic - unugtp

Where Is The Evaporator Coil Located In An Air Conditioner

Just like a refrigerator, an air conditioner relies on a refrigeration cycle to cool the air. At the heart of this cycle is the evaporator coil, where the cold magic happens. Let’s dive into the location and functions of this hidden hero.

Anatomy of An Air Conditioner

An air conditioner comprises several components working in harmony to cool your home. These components include:

  • Compressor: The heart of the system, compressing the refrigerant.
  • Condenser coil: Located outside, it releases heat from the refrigerant.
  • Evaporator coil: Situated inside, it absorbs heat from the indoor air.
  • Expansion valve: Regulates the flow of refrigerant.
  • Blower motor: Circulates air over the evaporator coil.

The Evaporator Coil: Where It’s At

The evaporator coil is typically located in the air handler, which is usually installed in a basement, attic, or closet. The air handler is a metal box that houses the blower motor and the evaporator coil. Cool air produced by the evaporator coil is then distributed throughout your home via ductwork.

The evaporator coil is usually positioned in a way that maximizes airflow. It’s commonly placed in the center of the air handler, with the blower motor positioned above or below it. This configuration ensures that air flows evenly over the coil, absorbing heat effectively.

Refrigeration Cycle: The Evaporator Coil’s Role

The refrigeration cycle is a continuous process that allows the air conditioner to cool your home. The cycle involves four main steps:

  1. Compression: The compressor compresses the refrigerant, increasing its pressure and temperature.
  2. Condensation: The hot, compressed refrigerant flows into the condenser coil outside, where it releases heat and condenses into a liquid.
  3. Expansion: The liquid refrigerant passes through the expansion valve, which reduces its pressure and temperature.
  4. Evaporation: The low-pressure refrigerant enters the evaporator coil, where it absorbs heat from the indoor air. This causes the refrigerant to evaporate and turn into a gas.

Importance of Maintaining the Evaporator Coil

The evaporator coil is a critical component in the refrigeration cycle, and its maintenance is crucial for optimal air conditioner performance. A dirty or clogged evaporator coil can reduce the efficiency of the air conditioner and lead to higher energy bills.

Regularly cleaning the evaporator coil can improve airflow, enhance cooling efficiency, and extend the lifespan of your air conditioner. Cleaning involves removing dirt, dust, and debris from the coil’s surface using a vacuum cleaner, brush, or coil cleaner.

Expert Tips for Evaporator Coil Maintenance

Here are some expert tips to keep your evaporator coil in pristine condition:

  • Schedule regular air conditioner maintenance with a qualified technician.
  • Clean the evaporator coil annually, especially before the start of summer.
  • Replace the air filter every 1-2 months during the cooling season.
  • Keep the area around the air handler clean and free of obstructions.
  • If you notice a decrease in cooling efficiency or an increase in energy bills, it might be time to inspect the evaporator coil.

By following these tips, you can ensure that your evaporator coil is functioning optimally, providing you with years of cool and refreshing air.

FAQs: Evaporator Coil Queries Answered

  1. Q: Where is the evaporator coil located in a window air conditioner?

    A: In a window air conditioner, the evaporator coil is typically located on the back of the unit, behind the air filter.
  2. Q: How often should I clean the evaporator coil?

    A: The evaporator coil should be cleaned annually, especially before the start of the cooling season.
  3. Q: Can I clean the evaporator coil myself?

    A: While it’s possible to clean the evaporator coil yourself, it’s recommended to have a qualified technician perform the task to ensure proper cleaning and avoid damaging the coil.


The evaporator coil is a hidden gem in your air conditioner, playing a vital role in keeping your home cool and comfortable. Understanding its location and function can help you appreciate the intricate workings of your air conditioner. By maintaining the evaporator coil regularly, you can ensure that your air conditioner operates efficiently, providing you with a refreshing respite from the summer heat.

So, the next time you switch on your air conditioner, spare a thought for the evaporator coil, the unsung hero that makes your home a cool oasis.

Are you interested in learning more about evaporator coils or other air conditioning topics?

Where Is The Evaporator Coil Located In An Air Conditioner

Condenser Coils & Evaporator - How These Two Cool Your Home
Image: mistralcleaning.com

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