HVAC - EPA Certification Practice Exam

What is categorized as a major repair in HVAC systems?

1. Replacing a service valve

2. Removing a compressor

3. Cleaning the evaporator coil

4. Checking refrigerant levels

The correct answer is: Removing a compressor

In the context of HVAC systems, a major repair is typically defined as a task that significantly impacts the operation and efficiency of the system. Removing a compressor is categorized as a major repair because the compressor is a critical component responsible for circulating refrigerant through the system. Its removal often indicates a serious issue, such as a breakdown or malfunction, which may require extensive labor and technical expertise to address. This repair is also likely to involve significant downtime and may require the installation of a new or rebuilt unit. In contrast, replacing a service valve, cleaning the evaporator coil, and checking refrigerant levels are generally considered routine maintenance tasks or minor repairs. Although these tasks are essential for the proper functioning and efficiency of an HVAC system, they do not involve removing or replacing major components like the compressor, and they typically do not necessitate as extensive a level of expertise or impact on the system's operation. Therefore, the classification of removing a compressor as a major repair reflects its critical role in the HVAC system and the complexity involved in addressing issues related to it.