Avoid Common Pitfalls: Top Air Conditioning Installation Mistakes

Installing an air conditioning unit in your home is an investment that requires careful planning and execution. Making mistakes during the installation can lead to increased energy bills, frequent repairs, and even damage to the unit. It’s important to understand the potential pitfalls to avoid them and ensure a smooth, efficient installation process.

One of the first steps in a successful air conditioning installation is selecting the right size unit for your home. Choosing the wrong size can result in inadequate cooling or excessive energy consumption. Proper placement of the air conditioner is also crucial. Positioning the unit poorly can affect its efficiency and increase wear and tear.

Choosing the Right Size Unit for Your Home

Selecting the right size air conditioning unit for your home is essential for effective cooling. An undersized unit will struggle to cool your space, running continuously, which increases wear and tear and energy consumption. Conversely, an oversized unit will cool the space too quickly, cycling on and off frequently, which can lead to humidity issues and a higher risk of system failures.

Measuring your home’s cooling needs involves calculating the square footage of the area to be cooled and considering factors like ceiling height, insulation, and window size. Our professionals use these details to recommend an appropriately sized unit for your home. This ensures you receive an air conditioning system that operates efficiently, providing consistent comfort without overworking.

In addition to size, the type of air conditioning unit matters. Central air systems, ductless mini-splits, and portable units all have different capacities and efficiencies. Our technicians can guide you through the decision-making process, ensuring you choose a system that fits your unique needs. A correctly sized and properly chosen unit maximizes efficiency and extends the lifespan of the system, avoiding costly errors down the line.

Ensuring Proper Placement of the Air Conditioner

Proper placement of your air conditioning unit is crucial for optimal performance. The location of the indoor and outdoor components can significantly impact the system’s efficiency and longevity. For the indoor unit, it should be placed in a central location with unobstructed airflow, away from heat sources like stoves or direct sunlight that can affect the thermostat’s readings.

The outdoor unit requires careful consideration as well. It should be situated in a shaded area, if possible, to reduce the workload. Good airflow around the unit is essential; avoid placing it near shrubs, fences, or walls that can hinder ventilation. Ensure there is at least a two-foot clearance around the unit for maintenance access and efficient operation.

Indoor and outdoor units should be installed on sturdy, level surfaces to prevent vibrations and noise. An unbalanced unit can suffer from increased wear, leading to frequent repairs and a shortened lifespan. Proper placement also includes securing electrical connections and ensuring proper drainage to avoid water damage. Our technicians are skilled in evaluating your space and identifying the best locations for unit installation, ensuring your system runs efficiently and effectively for years to come.

Common Installation Errors by Homeowners

Many homeowners attempt to install their air conditioning units themselves to save money, but this often leads to common errors. These mistakes can reduce the system’s effectiveness and shorten its lifespan. One frequent error is incorrect wiring, which can cause malfunctions or even electrical hazards. Improper connections can result in the unit failing to start or working inefficiently, leading to increased energy consumption and higher utility bills.

Another common mistake is poor refrigerant management. Handling refrigerants requires special training and certification. Incorrect levels of refrigerant can cause the unit to work inefficiently or even break down. Homeowners might also neglect to properly seal ductwork, leading to air leaks. Air leaks reduce efficiency and increase cooling costs, as the system must work harder to maintain the desired temperature.

Incorrect placement of the unit, as mentioned before, is another significant issue. Incorrect positioning can lead to airflow problems and uneven cooling. Inadequate support and unlevel surfaces can cause the unit to vibrate excessively, leading to mechanical wear and tear. By avoiding these common errors and relying on our professionals, you ensure that your system operates efficiently and lasts longer.

Importance of Professional Installation and Maintenance

Professional installation and maintenance are key to the longevity and efficiency of your air conditioning system. Our technicians have the expertise and the right tools to install your unit correctly the first time, ensuring that all wiring and connections meet safety standards. This minimizes the risk of electrical issues and optimizes the system’s performance.

Regular professional maintenance extends the life of the unit and keeps it running at peak efficiency. Maintenance includes cleaning filters, inspecting and cleaning evaporator and condenser coils, checking refrigerant levels, and ensuring all system components are functioning correctly. These tasks are beyond the typical homeowner’s skill set but are essential for system efficiency and safety.

Professional maintenance also prevents small issues from becoming major problems. Regular check-ups can identify early signs of wear or potential failures, allowing for prompt repairs that can save you from costly breakdowns. By choosing our professionals for both installation and ongoing maintenance, you protect your investment and ensure your home stays comfortable year-round.


Avoiding common pitfalls during air conditioning installation is crucial for ensuring a long-lasting and efficient system. Choosing the right size unit, ensuring proper placement, and avoiding common homeowner errors all contribute to the health and performance of your air conditioning system. Professional installation and regular maintenance offer peace of mind and help you get the most out of your investment.

We specialize in expert AC installation in Culver City that keeps your air conditioning system running smoothly. Trust our team at Marathon HVAC Services, LLC. to provide the knowledge and expertise necessary for optimal performance and longevity. Contact us today to schedule your air conditioning service and enjoy a cooler, more efficient home.