at minimum and 0

while one flash often points to an airflow or pressure switch fault

preventing oil entrapment that can lead to lubrication failure during low-load conditions

which are essential for maintaining secondary heat exchanger efficiency

Durable Sealing: High-density material maintains its shape and seal integrity under physical compression

Heatcraft Refrigeration 5709L Defrost Limit Thermostat 321894-706 at minimum and 0Heatcraft 5709L Defrost Limit Thermostat The Heatcraft 5709L Defrost Limit Thermostat is designed for commercial refrigeration systems that require reliable termination of the defrost cycle based on evaporator temperature. This temperature sensitive control closes at 35F and opens at 55F, helping protect evaporator coils while ensuring efficient system operation. Commonly used in walk in freezers and refrigerated storage applications, the 5709L