Cooling Systems

Cooling Systems

Air conditioners have three important parts that include a compressor, a condenser, and an evaporator. You'll learn basic repair and replacement tasks for these parts as we'll also cover ductless systems in this playlist.

Learn more about NexTech Academy's HVAC curriculum at https://www.nextechacademy.com

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Cooling Systems
  • How to Repair a Damaged Coil

    Repairing a coil in lieu of replacing a coil is a task that all HVAC technicians need to do at some point in their career. Here, we will show you an example of repairing a condensing coil that had a screw drilled into it by accident.

  • How to Braze a System with Dry Nitrogen

    Keeping the system clean is of utmost importance. This video will show you the tools you need and the process involved in purging a system with dry nitrogen while brazing in a system.

  • Repairing a Leak on a Ductless System

    Performing leak repairs on ductless systems is a task any good HVAC technician needs to understand how to do. In this video, we will show you where the most common leaks are, how to repair the leak, evacuate the system, and how to properly charge a ductless system.

  • How to Perform Maintenance on a Ductless System

    Ever wonder how to run a maintenance call on a ductless system properly? In this video, we will show you how to pull a blower wheel, clean an evaporator using a hose bib system, and check the system for proper operation without using gauges.

  • How to Replace a Thermal Expansion Valve on a Heat Pump

    Heat pumps use more than one expansion valve due to the fact that the refrigerant can flow in both directions. In this video, we will show you how one of these popular valves is replaced on the outdoor unit as opposed to the typical replacement on an indoor coil.

  • Evacuation Best Practices

    In this video, we will demonstrate how to pull the quickest, deepest vacuum using modern technology, and how to use high-performance vacuum kits designed to get this job done quickly and efficiently.

  • How to Add and Remove Refrigerant

    This video will show you the in's and out's of adding and removing refrigerant to a cooling system in the field. We will discuss heat pump charging in a separate video.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • Testing and Installing a Transformer

    In this video, you will learn how to accurately test and replace a transformer on an operating HVAC system.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • How to Measure Static Pressure

    Measuring static pressure is a vital task that must be performed in order to understand how the system is operating. It is also equally important to understand if there is a problem with the ductwork. This video will demonstrate how this is done.

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  • Replacing a Condenser Coil

    Often, a customer's condenser coil may be damaged by hail, ruined by corrosion, and cannot be combed out. Or, it could have a refrigerant leak, and be under warranty. In these cases, the coil itself on the outdoor unit needs to be replaced. This video will describe how this process is done.

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  • Measuring Resistance

    In this video, we will show you how to use a multimeter to check resistance on an electrical circuit in the field, which is a vital task for diagnosing equipment problems.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • EAC Maintenance Steps

    In this video, we will show industry-proven steps and tips on how to maintain electronic air cleaners.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • Installing a Compressor Terminal Repair Kit

    Many times you can have a compressor that has burned out terminals on it. This is usually caused by a loose connection. In this video, we will show you how to install a compressor terminal repair kit to get the system back up and running.

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  • Measuring Current

    Knowing how to check the current on system components is vital to an HVAC service technician. In this video, we will demonstrate how this is done.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • Cleaning and Unclogging a Condensate Drain Line

    This is one of the most common summertime calls. We will show you the methods of cleaning and unclogging a drain line for an A/C system.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • Installing a Surge Protector

    We will introduce you to the surge protector, as well as an industry-proven method of how to install them on a system. Depending on your region, these can be a great add-on to any maintenance or service call.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • Measuring Voltage

    It is imperative that you know how to safely and properly measure voltage on a system in the field. In this video, we will show you how to properly measure voltage on a piece of equipment.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • Installing an Emergency Pan Float Switch and EZ Trap

    In this video, you will learn about emergency pan float switches and the EZ trap float switches and how to install them.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • How To Inspect a Heat Exchanger

    This video showcases the proper way to inspect a primary and secondary heat exchanger on a condensing furnace in the field. This method can also be done on non-condensing furnaces as well. This is an important part of any heating system inspection and/or service calls as well.

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  • Ignitor Types Operation and Maintenance

    This video guides you through the various types of igniters. You will also learn how to perform general maintenance on them.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • Troubleshooting Ignitors and Flame Sensors

    In this technical video, we will show you how to properly diagnose and troubleshoot common problems with igniters and flame sensors on gas-fired equipment.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • Airflow Problems at Coils

    We will show you the importance of airflow on the coils and what types of problems are associated with airflow. We will look at indoor evaporator coils and outdoor condensing coils.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • Replacing an Evaporator Coil

    We will show you the right way to replace an evaporator coil on a system. This is an important task that needs to be done by technicians in the field.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com

  • Testing and Replacing a Start Capacitor

    Start-assist kits (hard starts), assist compressors in starting and reduce the starting current of the compressor. This video breaks down the process of checking and replacing these on a system.

    Interested in learning more about NexTech Academy? Visit https://www.nextechacademy.com