The automotive air conditioning system has witnessed remarkable changes in terms of technology, automation, durability, compatibility, and efficiency. The market for air conditioning parts for automobiles has increased significantly in the last three years with the invention of stronger line-up of compact and cost effective AC parts like clutch, relay, valves, hose, compressors, sensors, condensers, fan clutches, receiver- driers, evaporator cores, fan motors etc. Due to production of automobiles on the large scale, the demand for ac parts is also growing significantly and investment for producing reliable quality parts is also on a rise. The United States of America is the leading supplier of air conditioning parts in the global automotive market with a total share of 62 percent. China, Japan, Hong Kong, Canada and Germany are the other prominent manufacturing countries of ac parts.