Troubleshooting and servicing refrigeration and air conditioning systems can be a challenging process for entry-level or experienced technicians. Regardless of your experience, it is essential that you have a solid understanding of the fundamentals of refrigeration in order to troubleshoot a system of any size, in any location.
You also need to have the right tools and know-how to apply these principles to use the tool quickly and efficiently. A solid understanding of superheat and subcooling is essential.