Aprilaire 4403 Insert 319825-402 Its M12 female connector ensures

Its M12 female connector ensures a secure

Debris Protection: Includes an internal inlet filtered screen to prevent sediment from compromising the valve seat

For a complete TJLE assembly

Refer to the diagnostic chart on the furnace blower door

Environmental Protection: The NEMA 4X rating ensures the solenoid remains operational in wash-down areas or corrosive atmospheres

Aprilaire 4403 Insert 319825-402 Its M12 female connector ensuresThe Aprilaire 4403 Scale Control Insert is a critical humidifier replacement part engineered specifically for the Aprilaire Model 400 series, including the 400A and 400M. This U shaped component serves as the structural frame for the water panel, ensuring it remains properly positioned for optimal evaporation. Designed with a built in float chamber, the 4403 manages water levels effectively to prevent internal leakage and overflow. Its primary