Troubleshooting Calculator for Air Conditioning and Refrigeration Systems

This tool is used for trouble shooting air conditioning and refrigeration systems. On the front and back sides of the guide is a comprehensive chart with 19 categorized symptoms, possible causes and repairs. This is a very useful tool for troubleshooting almost any type of problem. This item is made of thick cardboard stock with metal corner rivets and measures 10 inches tall by 4 inches wide.