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What To Expect During A Central Air Conditioner Installation?

When preparing for a central air conditioner installation with TES Heating & Cooling, you can anticipate a thorough and professional process from start to finish. Our experts will perform an initial assessment to gauge your specific cooling needs and inspect the space for optimal unit placement. Expect precise installation that adheres to industry standards and seamlessly integrates with your existing HVAC system. Our team will ensure all components are properly configured and test the system meticulously to guarantee peak performance. Rest assured, from the initial consultation to the final walkthrough, TES Heating & Cooling’s priority is to deliver unmatched comfort and efficiency tailored to your home’s requirements. Have you ever wondered what exactly happens during a central air conditioner installation? Installing a new central air conditioning system is a significant investment that can dramatically enhance your home’s comfort and efficiency. Understanding the installation process can help you feel more prepared, reduce anxiety, and ensure that you know what to expect from your HVAC contractor. In this detailed guide, we’ll walk you through every aspect of a central air conditioner installation, from the initial consultation to the final inspection. This information is brought to you by TES Heating & Cooling, your trusted Los Angeles HVAC company, specializing in all types of HVAC systems.

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Initial Consultation and Preparation

The first step in the installation journey is the initial consultation and preparation phase. This stage sets the foundation for everything that follows.

Site Assessment

During the initial consultation, an HVAC professional will visit your property to assess the existing conditions and gather necessary data. This assessment includes evaluating the size of your home, inspecting existing ductwork, and identifying any potential challenges.

Load Calculation

Load calculation is essential for selecting the appropriate size and type of air conditioning unit. The contractor will perform a Manual J Load Calculation to determine the exact cooling requirements of your home. This calculation considers factors such as square footage, number of windows, insulation levels, and climate.

Choosing the Right Unit

Based on the load calculation, the contractor will recommend a few air conditioning models that fit your specific needs. You’ll discuss the pros and cons of each option, including energy efficiency ratings (SEER ratings), noise levels, and warranty details, to make an informed decision.

Written Estimate

Finally, you’ll receive a detailed written estimate outlining the scope of work, equipment to be installed, and the total cost. It’s a good practice to review this estimate carefully and ask any questions you might have.

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Pre-Installation Planning

The pre-installation planning ensures that everything is in place before the actual work begins. This phase reduces downtime and helps to avoid any last-minute surprises.

Acquiring Permits

Depending on local regulations in Los Angeles, the installation may require one or more permits. The HVAC contractor will take care of submitting the necessary paperwork to obtain these permits.

Ordering Equipment and Materials

Once you’ve agreed on the estimate and terms, the contractor will order the equipment and any additional materials needed for the installation. This may include things like new ductwork, refrigerant lines, electrical components, and more.

Preparing the Work Area

Preparation might include tasks like clearing the work area, protecting flooring and furniture, or even coordinating with other contractors if additional electrical or structural work is needed.

Installation Day

The big day has arrived! Here’s what you can expect during the actual installation process.

Arrival of Technicians

On the installation day, a team of HVAC technicians will arrive at your home. They’ll bring all the necessary equipment and materials along with them.

Removal of Old Unit

If you’re replacing an existing air conditioner, the first step will be to safely disconnect and remove the old unit. This includes handling the refrigerant, disposing of the old unit according to environmental regulations, and removing any old ductwork if required.

Installation of New HVAC Unit

Positioning the Condenser Unit

The outdoor condenser unit is typically installed on a concrete slab or a sturdy platform to keep it level and stable. This location should be free from obstructions and provide good airflow around the unit.

Setting Up the Air Handler

The indoor air handler or furnace is usually installed in a central location, such as a basement, attic, or utility room. The area should be easily accessible for future maintenance.

Connecting Refrigerant Lines

The next step is to connect the refrigerant lines between the outdoor condenser and the indoor air handler. These lines carry the refrigerant through the system, facilitating the cooling process.

Electrical Connections

Proper electrical connections are crucial for the system’s operation. The technicians will ensure that all wiring is up to code, including any necessary upgrades to the electrical panel.

Installing Ductwork

If your home requires new ductwork, it will be installed during this phase. Proper duct design and installation are essential for efficient airflow and temperature control.

System Testing

Once the installation is complete, the system will be tested thoroughly to ensure it operates correctly. This includes:

  • Checking refrigerant levels
  • Verifying electrical connections and voltage
  • Testing the thermostat and controls
  • Evaluating airflow and temperature distribution


After the installation, there are a few additional steps to complete the process and ensure everything runs smoothly.

Final Inspection

A final inspection is often required by local building authorities. The inspector will ensure that the installation meets all local codes and industry standards.


The technicians will clean up the work area, remove any debris, and ensure your home is left in the same condition as when they arrived.

System Walkthrough

Your HVAC contractor will provide a complete walkthrough of the new system. They will explain how to operate the thermostat, discuss any maintenance requirements, and provide tips for optimal performance.

Documentation and Warranties

You’ll receive documentation, including warranty information, user manuals, and a receipt for the installation. It’s important to keep these documents for future reference.

Ongoing Maintenance and Support

To keep your new air conditioning system running efficiently, ongoing maintenance is crucial. Here’s what you need to know.

Scheduling Regular Maintenance

Most manufacturers recommend bi-annual maintenance checks. Routine maintenance helps to catch issues early and extend the lifespan of your system.

DIY Maintenance Tasks

Here are some simple tasks you can perform yourself to keep your system running smoothly:

  • Change or clean the air filter regularly
  • Keep the outdoor unit free of debris
  • Check the thermostat settings

Professional HVAC Tune-Ups

Scheduling a professional HVAC tune-up at least once a year ensures that your system remains in peak condition. During a tune-up, a technician will:

  • Inspect and clean the condenser and evaporator coils
  • Check refrigerant levels
  • Lubricate moving parts
  • Verify the accuracy of the thermostat

Advantages of Professional Installation

Opting for a professional installation comes with several benefits that enhance the overall performance and longevity of your air conditioning system.

Expertise and Experience

HVAC technicians have specialized training and experience, ensuring the installation is done correctly and efficiently.


Dealing with electrical components, refrigerants, and heavy equipment can be dangerous. Professional technicians follow strict safety protocols to ensure the job is done safely.

Warranty Protection

Most manufacturers’ warranties require professional installation. Cutting corners on installation might lead to voiding your warranty.

Quality Assurance

A reputable HVAC company will stand behind their work, offering guarantees and follow-up support to ensure your satisfaction.

FAQs about Central Air Conditioner Installation

To further ease your concerns, here are some frequently asked questions regarding central air conditioner installation.

How Long Does the Installation Take?

Typically, a central air conditioner installation takes one to three days, depending on the complexity of the job and whether it includes new ductwork.

Can I Stay Home During the Installation?

Yes, you can generally stay home, but it’s often best to plan around the work to minimize disruption. The technicians will need access to various parts of your home throughout the day.

Will There Be Any Additional Costs?

The written estimate should cover all expected costs. However, unexpected issues can arise, such as the need for additional electrical work or unforeseen structural challenges.

What Should I Do If Problems Arise After Installation?

Contact your HVAC contractor immediately if you encounter any issues post-installation. Most reputable companies offer follow-up inspections and support to resolve any problems.

How Can I Maximize the Efficiency of My New System?

To get the most out of your new air conditioner, maintain it regularly, use a programmable thermostat, and ensure your home is well-insulated.

Why Choose TES Heating & Cooling?

Selecting the right HVAC contractor is critical for a successful installation. Here’s why TES Heating & Cooling stands out:

  • Wide Range of Services: We specialize in installing Mini Split, Heat Pump, Furnaces, Package Units, Wall Heaters, Air Ducts, Attic Ventilation & Insulation, Air Conditioning systems, and performing HVAC Tune-Ups & Maintenance.
  • Expertise: Our technicians are trained, certified, and experienced in handling various systems and brands.
  • Customer-Centric Approach: We prioritize our customers, ensuring personalized solutions to meet your specific needs.
  • Local Knowledge: Based in Los Angeles, we understand the local climate and building codes to provide installations that stand the test of time.


Installing a central air conditioning system is a detailed, multi-step process that requires professional expertise and careful planning. From the initial consultation to the post-installation walkthrough, understanding what to expect can make the experience smoother and more manageable. At TES Heating & Cooling, our goal is to provide top-notch custom installations that deliver year-round comfort. Whether you are upgrading your existing system or installing a new one, we are here to make the process as efficient and stress-free as possible. For more information or to schedule a consultation, visit us at www.tes-hvac.com, email us at info@tes-hvac.com, or give us a call at 424-400-6692.

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