645 Louisiana (New Orleans) Third Class Stationary Air Conditioning Certification Exam

645 Louisiana (New Orleans) Third Class Stationary Air Conditioning Louisiana’s Third Class Stationary AC certification qualifies you for hands-on roles maintaining rooftop and building-wide cooling systems in New Orleans’ humid climate. You’ll diagnose refrigerant leaks, calibrate thermostats, and service compressors on commercial HVAC units—the systems keeping offices, hospitals, and hotels operational. Real troubleshooting skills matter here understanding pressure differentials and electrical safety protocols keeps you employed and safe on the job.