Recent SemestersSpring 2026, Fall 2025, Spring 2025, Summer 2024, Fall 2023Class Size24–25 studentsCredits3 Transfers ToNot transferableDescriptionThis course develops competency in the theoretical troubleshooting of mechanical problems in air conditioning and refrigeration systems through an understanding of the operating principles for electrical wiring systems used in air conditioning and refrigeration installations. It is recommended for persons who want to develop or improve job skills in the air conditioning, heating and refrigeration industry. Together with the lab course ( AC R020L ), this course targets the service technician who wishes to develop skills in reading wiring diagrams, identifying electrical components, and electrical troubleshooting and repair skills. It is also applicable for students wishing to enter the industry in the capacity of installer, sales representative, maintenance technician, or designer.Usually HeldThu 12:30pm–3:20pm, Tue 6:30pm–9:20pm, Tue Thu 6:30pm–9:45pm, Wed 9:00am–11:50am 