The evaporator coil is a vital component in an air conditioning system. It assists the unit in cooling the air in a room efficiently and is a critical part of the cooling process. This article reviews the evaporator coil’s role and how to keep it in top condition.


In simple terms, the air conditioner pulls the hot air from the room and transports it outside. An air conditioning system has three main components: the evaporator coil, the blower fan, and the air filter. The unit is positioned so that half of it is inside the house and the other half is outside.

The fan pulls hot air into the unit from inside the house, passing through the air filter to remove dust and any particles. Once the air is cleared, it reaches the evaporator coil, filled with a liquid refrigerant. The refrigerant inside the evaporator coil cools the air as it passes over it, then the blower fan sends the cool air back inside the home.


Refrigerant is pulled through the evaporator coil by the compressor, located in the outer part of the air conditioning system. The evaporator coil holds the cool refrigerant and absorbs the heat pulled inside the unit by the fan blower. The air conditioning unit won’t create the desired room temperature level if the evaporator coil fails to cool the refrigerant.


Every part of the air conditioning unit needs regular maintenance to perform well. When it comes to the evaporator coil, two main procedures need to be done:

  • Cleaning: Even a slight amount of dust or debris accumulated on the evaporator coil’s surface may compromise its ability to absorb heat from the air. As a result, the unit will work harder to reach the desired temperature. A professional will thoroughly clean the evaporator coil as part of regular maintenance.
  • Servicing: Airborne chemicals (such as cleaning products or air fresheners) may produce corrosion on the evaporator coil and eventually generate tiny leaks. A professional in air conditioning systems will inspect the unit for leaks and fix them efficiently.


Without each component working efficiently, an air conditioning system would be unable to cool a room effectively. Each piece plays a critical role in the cooling process. The evaporator coil’s role is extremely important as it’s the component that cools the refrigerant, thus allowing the unit to absorb the ambient heat and cool a room. To ensure the air conditioner works properly, homeowners must conduct regular checkups on the unit.


Whenever it’s time to check an air conditioning unit, don’t hesitate to contact a licensed company. Qualified professionals can ensure the unit works efficiently and resolve any minor issue that may compromise its functioning.

Hacienda Air is a locally owned HVAC company offering air conditioning, heating, ductwork, air quality, and more to residential and commercial customers in North Las Vegas, Summerlin, and surrounding areas. Call us today at (702) 707-4953.