and S8670 ignition modules

leak-free seal under demanding thermal cycling

Remote Bulb Flexibility: The 9-foot capillary allows for versatile sensor placement while keeping the transmitter head accessible

ensure the regulator is mounted in an upright position in a horizontal pipe run

Williams 7699 Limit Switch 321042-401 and S8670 ignition modulesThe Williams 7699 Limit Switch is a critical OEM safety device designed for furnace overheat protection in professional heating applications. Engineered for precision, this L95 10F limit switch features a 95F high limit cut out with a 10F differential, ensuring the combustion chamber remains within safe operating parameters. As a veteran grade replacement furnace part, the 7699 model is built to handle the rigorous duty cycles of Williams gas fired