Heatcraft Refrigeration 5709L Defrost Limit Thermostat 321702-401 The Carrier 342970-75107 Filter Door

The Carrier 342970-75107 Filter Door Kit is a critical factory authorized part engineered to maintain the structural integrity and static pressure balance of your air handling unit or furnace

Built for industrial-grade performance

protecting the heat exchanger from premature fouling

providing flexibility for both control circuit and fractional horsepower motor applications

Heatcraft Refrigeration 5709L Defrost Limit Thermostat 321702-401 The Carrier 342970-75107 Filter DoorHeatcraft 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