One of the most important applications of refrigeration (which was invented in the early 1900s) was for the preservation of food. When different types of food1 are kept at room temperature, some of them will spoil rapidly. When foods are kept cold, they will last longer. Refrigerators prevent food spoilage by keeping the food cold.
The refrigerator consists of three parts:
• The cabinet.
• The sealed system, which consists of the evaporator coil, the condenser coil, the compressor, and the connecting tubing.
• The electrical circuitry, including fan motors and other electrical components.
This chapter covers the electrical components and how to diagnose the sealed system. The actual repair or replacement of any sealed-system ...