Understanding Evaporator Coils: Key Functions and Benefits

The Importance of Evaporator Coils in AC Systems

As professional HVAC contractors, we understand the significance of having a functioning air conditioning system, especially during the hot summer months. One essential component of the AC unit is the evaporator coil, which is responsible for collecting heat from inside the house and working with other AC components to release the heat outdoors, resulting in a cool and comfortable living environment.

The evaporator coil is an integral part of the air conditioning system that plays a crucial role in keeping your home cool and comfortable during the hot summer months. It is responsible for absorbing heat from the air in your home and transferring it to the refrigerant, which is then released outside through the condenser coils. Without the evaporator coil, your air conditioning system would not be able to cool your home properly

How Evaporator Coils Work

The evaporator coil is typically made of copper or steel and is designed to absorb heat from the air in your home. As the refrigerant flows through the coil, it absorbs the heat and becomes a gas. The gas is then compressed, which causes it to release the heat outside through the condenser coils. The evaporator coil is responsible for absorbing the heat from the air in your home, and without it, your air conditioning system would not be able to cool your home properly. It is important to maintain your evaporator coil in order to ensure that it is working properly and efficiently. Regularly cleaning or replacing the filter, checking for any signs of damage, and ensuring that the refrigerant levels are appropriate can all help you keep your system running smoothly. In addition, regular check-ups by a professional HVAC technician can help ensure that your system is functioning at its best. Keeping your evaporator coil clean and maintained will help you save money in the long run by helping to make sure that your air conditioning system runs as efficiently as possible.

Evaporator coil inside an air handler, with the front door removed to show the coil in its casing.
3D image of an evaporator coil inside an air handler with the front door removed, showing the components and structure of the coil.

Signs of a Malfunctioning Evaporator Coil

Over time, the evaporator coil can become dirty and clogged with dust and debris, which can reduce its efficiency and cause it to freeze. When the evaporator coil is faulty, it can affect the cooling process, causing the air conditioning unit to stop functioning altogether. If you notice the AC unit expelling warm air, making strange sounds such as a hiss or bang, or if there is refrigerant leakage close to the indoor cooling part, it's time to call a professional HVAC technician to inspect and repair your AC unit. The technician will inspect and clean the evaporator coil, and the blower wheel, making sure it is clean and optimal for airflow. They may also replace any worn-out parts that could be preventing the AC from cooling your home efficiently. After a thorough inspection of the evaporator coil, the technician can provide advice on how to maintain it and help you avoid future problems. By following their advice

Dirty evaporator coil and blower wheel in an air handler.
A dirty evaporator coil and blower wheel can reduce the efficiency of your HVAC system. Regular maintenance can prevent costly repairs and increase the lifespan of your equipment.

Common Issues with Evaporator Coils and Solutions

To prevent costly repairs and ensure optimal performance of your air conditioning system, it is essential to have regular maintenance check-ups by a certified HVAC technician. During the check-up, the technician will clean and maintain the evaporator coils, which can prevent dust and dirt accumulation, improving the coils' longevity. Additionally, replacing air filters on a monthly basis can further prevent dust and dirt accumulation, improving the coils' efficiency and preventing costly AC repairs. In addition to these preventive maintenance tips, it is important to also keep an eye out for any unusual noises or smells coming from your air conditioning system - this can be a sign of a problem that needs to be addressed by a certified HVAC technician. Following these steps can help ensure your AC system runs efficiently and effectively all year round.

Evaporator Coil Replacement and Cost

If the evaporator coil cannot be repaired, it may need to be replaced, which can cost between $600 to $2000, depending on the warranty and model. Replacing the evaporator coil can restore the AC unit's proper function and save energy costs in the long run. It's important to have an HVAC professional inspect and replace the evaporator coil as it requires a high-voltage electrical connection, which can be dangerous for those who are not trained in HVAC.

What we've discussed in this article

The evaporator coil is an essential component of your air conditioning system that plays a crucial role in keeping your home cool and comfortable during the hot summer months. Regular maintenance and cleaning of the evaporator coils are crucial in preventing AC malfunction, energy costs, and costly repairs. It's essential to have an HVAC professional perform routine maintenance and inspect your AC unit to ensure optimal performance and longevity. Contact our customer care team for any inquiries you have about your products, warranties, and dealer issues.