NATE Air Conditioning and Heat Pumps Practice Exam 2026 – All-in-One Guide to Master Your Certification!

When checking an air conditioning system, it's essential to evaluate multiple types of pressures to gain a complete understanding of the system's performance and functionality.

High side pressure refers to the pressure within the condenser and is crucial for assessing how effectively the refrigerant is being condensed. If this pressure is too high, it may indicate issues such as airflow restrictions or problems with the condenser.

Low side pressure relates to the pressure in the evaporator and plays a vital role in determining how well the refrigerant is evaporating and absorbing heat. Evaluating this pressure can help identify problems like insufficient airflow or issues with the expansion valve.

Static pressure involves the resistance to airflow in the system's ductwork. By measuring static pressure, technicians can diagnose airflow problems that may not be evident through other pressure readings alone.

By checking all these pressures, technicians can diagnose various issues more accurately and ensure the air conditioning system operates efficiently. Each pressure measurement provides unique insights, and using them collectively gives a holistic view of the system's health and performance.