The Frigidaire 5303918202 defrost thermostat restores proper defrost temperature control for consistent refrigerator cooling performance. Designed as a replacement thermostat, it monitors the temperature of the evaporator during the defrost cycle and regulates power to the defrost heater when the preset temperature is reached. This process prevents excessive frost accumulation while supporting efficient airflow throughout the refrigerator. Its durable construction withstands regular household use and provides reliable temperature sensing. Replacing a worn, damaged, or faulty defrost thermostat improves defrost performance, reduces frost buildup, and maintains stable cooling conditions.