The Frigidaire 216731001 Defrost Thermostat for Refrigerator restores accurate defrost temperature control for consistent cooling performance. This replacement thermostat monitors the evaporator temperature and automatically opens or closes the electrical circuit to control the defrost heater at preset temperatures. Designed to replace a faulty or worn component, it prevents excessive frost buildup and supports proper airflow throughout the refrigerator. Compatible with select refrigerator models, this thermostat reduces cooling problems caused by ice accumulation, maintains consistent internal temperatures, and supports efficient defrost performance. It provides a practical replacement for dependable refrigerator functionality and reliable food preservation.