[CONNECTICUT (CT) D?4 Limited Heating-Cooling Journeyperson Exam Success Course] The Connecticut (CT) D?4 Limited Heating-Cooling Journeyperson Practice Course is designed for individuals pursuing journeyperson certification in heating and cooling systems. This course covers key aspects of heating and cooling system installation, maintenance, and troubleshooting. Participants will gain practical experience with various HVAC components and technologies, focusing on safety practices and code compliance. The curriculum includes hands-on exercises and real-world case studies to enhance problem-solving skills. By completing this course, participants will be well-prepared to pass the Limited Heating-Cooling Journeyperson exam and excel in their HVAC roles.