The ideal book for students and beginning technicians, this Ninth Edition of ELECTRICITY FOR REFRIGERATION, HEATING, AND AIR CONDITIONING provides readers with the basic electrical principles necessary to understand today's modern control systems. The book's practical approach allows readers to focus exclusively on the electronics information they will use in the field, without bogging them down in unnecessary theory. The book focuses on helping readers master systematic diagnosis and troubleshooting methods and procedures that will enable them to become highly-skilled, professional HVAC-R service technicians.