Hannibal/Quincy Chapter: Automotive HVAC Systems: Essential Diagnostics

This class provides a solid foundation of essential HVAC diagnostic procedures, based upon diagnostic best practices, in order to assure correct and complete diagnostic conclusions of common HVAC failures. Topics will include temperature and pressure testing, the diagnosis of compressor clutch controls, PWM fan diagnostics, and variable displacement compressor controls. Special emphasis will include how to evaluate overall performance and efficient choice of diagnostic methods. The effects of internal heat exchangers and how they change expected test results compared to a “traditional” system will also be featured.