This module explores the critical diagnostic and support tools that allow HVAC technicians to verify system efficiency. You will learn how to use precision instruments to measure airflow, electrical properties, and environmental conditions like humidity and temperature. Additionally, the module covers essential miscellaneous tools that are vital for troubleshooting, layout, and maintaining safety standards in confined or dark workspaces.

This module emphasizes that safety is the top priority for every HVAC technician, providing a comprehensive overview of the PPE required to work confidently in challenging environments. You will learn how to protect against various site hazards, including electrical risks, sharp duct edges, loud machinery, and respiratory irritants. Additionally, the module covers critical life-safety procedures, such as using lockout tagout kits to de-energize equipment and maintaining mandatory fire protection when working with modern, mildly flammable refrigerants.

This final knowledge check is designed to reinforce key concepts from the lesson and assess your understanding. You’ll apply what you’ve learned through a series of multiple choice questions, helping ensure you’re confident and ready to move forward.