This trade involves installation, servicing, and repair of refrigeration and air conditioning systems used in homes, commercial buildings, and industries. Mechanics work on compressors, condensers, evaporators, and control systems to ensure efficient cooling. They diagnose faults, refill refrigerants, and maintain system performance. This trade requires knowledge of thermodynamics, electrical systems, and safety practices. Refrigeration and air conditioning mechanics are in high demand in residential, commercial, and industrial sectors. Career opportunities include HVAC companies, service centers, and maintenance departments.