HVAC technicians install, maintain, and repair heating, ventilation, and air conditioning systems. They inspect HVAC systems, diagnose issues, and perform repairs or replacements as needed. Additionally, they conduct regular maintenance to ensure system efficiency and longevity. HVAC technicians may also advise clients on energy-saving practices, recommend upgrades or replacements, and adhere to safety regulations. Effective communication and technical proficiency are essential for success in this role.