leak-proof interface between the cover plate and the heat exchanger or boiler section

maintaining a clean

the deep groove architecture and C0 clearance provide the structural rigidity necessary to maintain alignment in high-torque motor applications

this 1/2" NPT-compatible shaft ensures a reliable conductive path to the sensor head

Johnson Controls A421AEC-02 Temperature Control 30067439-890 leak-proof interface between the coverThe Johnson Controls A421AEC 02 is a heavy duty single stage electronic temperature control engineered for precision in demanding HVACR environments. This unit serves as the direct replacement for A419AEC 2 and A419AEC 2C, offering a critical upgrade for contractors maintaining refrigeration, space heating, and cooling systems. Housed in a NEMA 4X enclosure (IP66), this controller is built to withstand wash down environments and high moisture