White-Rodgers 3L09-4 Limit Switch or threaded into position—making it

or threaded into position—making it compatible with virtually all pilot burners found in furnaces

allowing for direct hardwired connection to your controller's analog input without requiring additional conduit in many jurisdictions

this 100277953 volute gasket provides the high-tolerance seating required for professional-grade service

OEM Compatibility: Exact replacement for Bloomfield WS-84804

this part is essential for maintaining tight shutoff and preventing bypass leakage in closed-loop HVAC systems

White-Rodgers 3L09-4 Limit Switch or threaded into position—making itThe White Rodgers 3L09 4 Limit Switch is a 1 2 inch bimetal disc control engineered for critical thermal protection in residential furnaces and air handling units. Designed for high speed contact separation, this SPST board mount limit switch functions on a fixed thermal profile, featuring a 150 degree F open temperature and a 130 degree F close temperature. With a 3. 12 inch insertion length, this plenum high limit control ensures the sensing element