Johnson Controls A421AET-01 Temperature Control R-22 The Williams 9809 Kit is

The Williams 9809 Kit is a critical direct-vent furnace venting solution designed specifically for the Williams 60077 Series

use a WEL14A-602R bulb well or a compatible packing nut to protect the sensing element

000 operations

Common Questions Which cores are compatible with the P-489 shell

Johnson Controls A421AET-01 Temperature Control R-22 The Williams 9809 Kit isThe Johnson Controls A421AET 01 is a line voltage electronic temperature control designed for versatile HVACR applications, providing a reliable alternative to traditional electromechanical thermostats. Operating on 120 240 VAC, this SPDT controller features a broad setpoint range of 40 to 212F, making it ideal for both refrigeration and heating logic. Built with a NEMA 1 enclosure for surface mounting, the unit includes a high visibility front panel