Common Mistakes to Avoid during Air Conditioner Installation

Installing an air conditioner is an important investment for your home, and you want to ensure that it's done correctly. Unfortunately, some common mistakes can occur during the installation process that can lead to poor performance and even damage to the unit. In this article, we'll discuss the most common mistakes to avoid during air conditioner installation, so you can enjoy cool air in your home without any issues.

​I. Sizing Mistakes

One of the most common mistakes during air conditioner installation is choosing the wrong size of the unit. An air conditioner that is too small or too large for the space it is intended to cool will not function effectively.

An undersized air conditioner will struggle to cool the space, leading to increased energy consumption and wear and tear on the unit. On the other hand, an oversized air conditioner will cool the space too quickly, resulting in frequent cycles and high humidity levels, which can cause mold growth and other indoor air quality issues.

Proper sizing is crucial for the efficiency and longevity of the air conditioner. It is important to consult with an HVAC professional to determine the correct size of the unit needed for the space. The professional will consider factors such as the size of the space, insulation, and local climate to determine the appropriate size of the unit.

II. Improper Electrical Wiring

One of the most common mistakes during air conditioner installation is incorrect or inadequate electrical wiring. An air conditioner requires a dedicated electrical circuit to ensure it gets the required power supply. However, some homeowners may attempt to connect the AC unit to an existing electrical circuit, which can lead to electrical hazards and system failure.

Improper electrical wiring can lead to electrical hazards such as short-circuits, electrical fires, and damage to the AC unit. In addition, it can cause the circuit breaker to trip, leading to an interrupted power supply to the air conditioner.

It is important to hire a licensed electrician to ensure that the wiring work is done correctly and safely. An electrician will also be able to assess the electrical capacity of your home and determine if additional wiring or an electrical panel upgrade is needed to support the new AC unit.

It is essential to follow the manufacturer's guidelines and local electrical codes to avoid any electrical hazards and ensure the safe and efficient operation of the air conditioner. A licensed electrician will ensure that the electrical work meets the required standards and codes, avoiding any risks associated with improper electrical wiring.

III. Poor Insulation

Improper insulation is a common mistake that homeowners make during air conditioner installation. Poor insulation in the attic or around the ducts can cause a lot of heat loss, which can reduce the effectiveness of the air conditioning unit. Without adequate insulation, cool air from the AC can escape, causing the unit to work harder to cool the house.

Poor insulation can cause an AC unit to work harder, increasing energy consumption and causing higher utility bills. Additionally, poor insulation can also cause the air conditioner to wear out faster, leading to frequent repairs and replacement costs.

To avoid these issues, it's essential to ensure proper insulation during the air conditioner installation. Proper insulation helps to keep the cool air inside and the hot air outside, reducing the strain on the air conditioner and improving its energy efficiency. Homeowners can work with their HVAC contractor to determine the best type of insulation for their home and ensure that it is properly installed.

IV. Inaccurate Refrigerant Charging

Refrigerant is a crucial component of an air conditioning system that transfers heat from the indoor space to the outside environment. If the refrigerant charge is inaccurate, it can lead to various problems with the system's performance.

Overcharging or undercharging of refrigerant can lead to a range of issues, such as decreased cooling capacity, reduced energy efficiency, higher utility bills, and increased wear and tear on the system's components. Additionally, improper refrigerant charge can cause the AC compressor to overheat, leading to compressor failure and costly repairs.

Refrigerant charging requires technical expertise, knowledge, and specialized equipment. It's a job that should be left to professionals who are trained and certified to handle refrigerant. HVAC technicians use advanced tools and techniques to measure and adjust the refrigerant charge accurately, ensuring optimal performance and longevity of the AC unit. A professional will also follow the Environmental Protection Agency (EPA) regulations and guidelines for refrigerant handling and disposal, preventing damage to the environment and keeping you safe.

V. Neglecting Airflow

One common mistake during air conditioner installation is neglecting airflow, which can lead to reduced efficiency and increased energy costs. Poor installation of ductwork, registers, and grilles can cause air to be restricted or unevenly distributed throughout the home, resulting in some rooms being warmer than others.

Poor airflow can also cause the AC unit to work harder than necessary to cool the home, which can lead to increased wear and tear on the system and a shortened lifespan. In addition, restricted airflow can cause the evaporator coil to freeze, which can damage the system and require expensive repairs.

To avoid these issues, it is important to ensure that the ductwork and airflow components are properly installed and functioning efficiently. This includes proper sizing and placement of ductwork, as well as the use of high-quality filters and regular cleaning to prevent blockages. It is recommended to have a professional HVAC technician perform airflow testing to ensure that the system is functioning optimally and delivering the proper amount of air to each room of the home. Proper airflow is critical to the overall performance and efficiency of an air conditioning system.

VI. Incorrect Placement of Outdoor Unit

A properly placed outdoor unit is essential for the efficient operation and longevity of the air conditioning unit. One common mistake during installation is incorrect placement of the outdoor unit. This can happen if the installer chooses an inappropriate location or fails to consider factors that could affect the unit's performance.

Improper placement can result in poor airflow, insufficient cooling, and increased wear and tear on the unit. For example, placing the outdoor unit in an area with poor ventilation or low airflow can lead to inefficient heat exchange, reducing the unit's cooling capacity and increasing energy consumption. Similarly, positioning the unit in direct sunlight or areas with excessive heat or humidity can lead to overheating, reducing the unit's efficiency and lifespan.
To avoid these problems, it's crucial to select a suitable location for the outdoor unit during installation. This location should be well-ventilated, sheltered from direct sunlight, and away from sources of heat or humidity, such as exhaust vents, dryer vents, or outdoor grills. The unit should also be elevated above ground level to avoid flooding and debris accumulation. The installer should also consider the distance between the outdoor unit and the indoor unit, as this can affect the unit's efficiency and performance.

Correct placement of the outdoor unit is crucial for optimal performance and longevity of the air conditioning unit. It's important to hire a licensed and experienced HVAC professional who can assess your home's needs and install the unit in the most suitable location.

In conclusion, air conditioner installation can be a complex process that requires attention to detail and technical expertise. Common mistakes during installation can lead to reduced efficiency, shortened lifespan of the unit, safety hazards, and higher energy costs. By avoiding sizing mistakes, ensuring proper electrical wiring, adequate insulation, accurate refrigerant charging, proper airflow, and correct placement of the outdoor unit, you can avoid these issues and ensure optimal performance of your AC unit. It is important to hire a licensed and experienced HVAC professional to handle the installation process and ensure that your system is installed correctly and safely.