Repair or Replace: Air Conditioner Coil Dilemma

Deciding whether to replace the air conditioner coil or purchase a new system can be a difficult decision for homeowners in Sanford, Florida. The evaporator coil, also known as the air conditioner coil, is a critical component of any AC system. In this blog post, we will discuss the importance of the evaporator coil, the common reasons for its failure, and whether investing in a new evaporator coil or a new system is the right choice for your home.

The Importance of the Evaporator Coil

The cooling process in your central air conditioning system heavily relies on the functionality of the evaporator coil, which is located within the condenser of the system. The air handler blows warm air over the coil, allowing the refrigerant to flow through and absorb heat and moisture from the air. As a result, the air is cooled and dehumidified, providing refreshing air into your home. However, a clogged air filter can restrict the airflow over the evaporator coil, leading to reduced efficiency and increased wear and tear on the coil. Additionally, if there is a problem with the refrigerant flow, it can lead to inadequate cooling, resulting in higher energy bills and discomfort in your home. This is why it’s crucial to maintain your AC unit regularly, including changing the air filter and ensuring the proper refrigerant flow. By doing so, you can prevent costly damages and extend the lifespan of your AC unit, ultimately saving you money in the long run.

Reasons for Evaporator Coil Failure

Like any part of your AC system, the evaporator coil experiences wear and tear over time, and its efficiency gradually decreases. Proper maintenance can extend the lifespan of the coil up to 20 years. However, erosion is the primary reason for most failed evaporator coils. As the refrigerant passes through the coil and changes temperature, it expands and contracts, gradually weakening the inner lining of the coil. Erosion from external sources can further weaken the exterior, making the entire coil more vulnerable to damage and leaks. Additionally, impact or debris can cause damage to the evaporator coil.

Types of Evaporator Coils

There are various types of evaporator coils available in the market today. Cased evaporator coils are the most common type, and they come in different subtypes. However, uncased coils are also an option for those with unique needs.

Cased Evaporator Coils

Most homes and businesses use cased evaporator coils for their air conditioning units. These coils are popular because they are durable and easy to install. There are three common subtypes of cased evaporator coils:

• A Coils: These coils are named after their shape, which looks like a capital letter “A.” They are mostly used in vertical air conditioners where the air flows either up or down through the coils. A Coils are efficient and can hold enough refrigerant to operate at a high level of efficiency.

• N Coils: N Coils are named after their shape, which looks like a capital letter “N.” These coils can work for both vertical and horizontal air conditioners. N Coils are becoming more popular because they are smaller than other options and operate at a higher level of energy efficiency.

• Slab Coils: Slab coils are the least common type of coils and are usually used for horizontal air conditioning units.

Uncased Evaporator Coils

Uncased evaporator coils can work for both vertical and horizontal air conditioning units. They are ideal for systems that require customization because they have no outer casing. As a result, the shape of the coils can be easily adjusted to fit your unit’s needs. However, it’s important to note that after purchasing an uncased evaporator coil, an expert technician may be required to customize the shape to fit your unit properly.

Replacing the Evaporator Coil or Buying a New System

Are you considering a system replacement for your central air conditioning system or split system? If so, it’s important to evaluate the benefits of upgrading to a newer system, such as improved energy efficiency and enhanced comfort. While replacing an evaporator coil can be a costly decision, it may be more cost-effective in the long run to invest in a new system that has a higher SEER rating and better features, such as a variable speed blower.

If your current air heating and air conditioning system is older, upgrading to a mid-range replacement can offer significant improvements over your previous installation. Additionally, if your system is newer, the evaporator coil may still be under warranty, making its replacement a justifiable expense.

To ensure the longevity of your system, it’s always wise to schedule an annual AC tune-up with a professional HVAC technician. By doing so, you can catch any potential issues before they become major problems and extend the life of your air conditioner coil.

When considering a system replacement for your central air conditioning system or split system, it’s important to carefully evaluate your options and consider the long-term benefits of upgrading.


In conclusion, the evaporator coil is a crucial component of any AC system, and its failure can cause discomfort in your home. Replacing the evaporator coil or purchasing a new system can be a costly decision, but with proper maintenance and careful consideration, you can ensure that your home remains cool and comfortable year-round.

Pronto Air is your go-to HVAC service provider for all your heating and cooling needs. Our team of experts is dedicated to providing top-notch services to keep your home comfortable throughout the year. We offer a range of HVAC services, including installation, repair, and maintenance of air conditioning units, furnaces, and heat pumps.

If you are experiencing issues with your HVAC system or want to ensure it is running at peak efficiency, contact us today at (813) 341-5400 to schedule an appointment. Our team of experienced technicians will diagnose and resolve any issues with your system to keep it running smoothly.

At Pronto Air, we understand that replacing the evaporator coil or purchasing a new system can be a costly decision. Therefore, we take a careful and personalized approach to help you make an informed decision. We will provide you with all the information you need to determine whether it is more cost-effective to repair or replace your system.

Don’t let HVAC issues disrupt your home’s comfort. Contact Pronto Air today to schedule an appointment and let our team of experts take care of all your HVAC needs.

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