Final answer:
Before checking the operating superheat of a system, a technician should first verify proper airflow. This is crucial as it affects the entire heat exchange process and ensures accurate superheat measurement.
Step-by-step explanation:
Before checking a system's operating superheat, a technician should check the airflow first. Proper airflow is critical because it affects the heat exchange process in both the evaporator and condenser coils. Additionally, the technician should confirm the system is running and has reached a steady state so that the measurements will be accurate. It's only after verifying proper airflow that the technician can accurately determine the system's superheat, which is essential for ensuring the air conditioner is functioning efficiently. It is worth noting that, although the other factors such as ambient temperature, system pressures, and refrigerant type are also important in the overall function of an HVAC system, airflow must be verified first to ensure that any readings taken are reflective of the system's true operating conditions.